/* TA-LIB Copyright (c) 1999-2025, Mario Fortier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
*   notice, this list of conditions and the following disclaimer in
*   the documentation and/or other materials provided with the
*   distribution.
*
* - Neither name of author nor the names of its contributors
*   may be used to endorse or promote products derived from this
*   software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/* AUTO-GENERATED by ta_codegen — DO NOT EDIT.
* Source of truth: ta_codegen/input/<name>/  (regenerate: cd ta_codegen/generator && cargo run -- generate)
*/

#include <string.h>
#include <math.h>
#include "ta_func.h"
#include "ta_utility.h"
#include "ta_memory.h"
#include "ta_func_unguarded.h"

/* List of contributors:
 *
 *  Initial  Name/description
 *  -------------------------------------------------------------------
 *  MF       Mario Fortier
 *
 *
 * Change history:
 *
 *  MMDDYY BY     Description
 *  -------------------------------------------------------------------
 *  120802 MF     Template creation.
 *  052603 MF     Adapt code to compile with .NET Managed C++
 *  070326 MF,CC  Remove the smoothPrice circular buffer: it was written
 *                on every bar but never read in this function (issue #88).
 *                The trendline averages RAW price over the dominant cycle
 *                period, exactly as published (Ehlers, "Rocket Science
 *                for Traders": ITrend sums Price, not SmoothPrice).
 */

TA_LIB_API int TA_HT_TRENDLINE_Lookback( void )
{
   /* 31 input are skip
    * +32 output are skip to account for misc lookback
    * ---
    *  63 Total Lookback
    *
    * 31 is for being compatible with Tradestation.
    * See mama_lookback for an explanation of the "32".
    */
   return 63 + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_HT_TRENDLINE,Ht_trendline);
}

TA_LIB_API TA_RetCode TA_HT_TRENDLINE( int    startIdx,
                                       int    endIdx,
                                       const double inReal[],
                                       int          *outBegIdx,
                                       int          *outNBElement,
                                       double        outReal[] )
{
   int outIdx;
   int i;
   int lookbackTotal;
   int today;
   double tempReal;
   double tempReal2;
   double adjustedPrevPeriod;
   double period;
   int trailingWMAIdx;
   double periodWMASum;
   double periodWMASub;
   double trailingWMAValue;
   double smoothedValue;
   double iTrend1;
   double iTrend2;
   double iTrend3;
   double a;
   double b;
   double hilbertTempReal;
   int hilbertIdx;
   double detrender_Odd[3];
   double detrender_Even[3];
   double detrender;
   double prev_detrender_Odd;
   double prev_detrender_Even;
   double prev_detrender_input_Odd;
   double prev_detrender_input_Even;
   double Q1_Odd[3];
   double Q1_Even[3];
   double Q1;
   double prev_Q1_Odd;
   double prev_Q1_Even;
   double prev_Q1_input_Odd;
   double prev_Q1_input_Even;
   double jI_Odd[3];
   double jI_Even[3];
   double jI;
   double prev_jI_Odd;
   double prev_jI_Even;
   double prev_jI_input_Odd;
   double prev_jI_input_Even;
   double jQ_Odd[3];
   double jQ_Even[3];
   double jQ;
   double prev_jQ_Odd;
   double prev_jQ_Even;
   double prev_jQ_input_Odd;
   double prev_jQ_input_Even;
   double Q2;
   double I2;
   double prevQ2;
   double prevI2;
   double Re;
   double Im;
   double I1ForOddPrev2;
   double I1ForOddPrev3;
   double I1ForEvenPrev2;
   double I1ForEvenPrev3;
   double rad2Deg;
   double todayValue;
   double smoothPeriod;
   int idx;
   int DCPeriodInt;
   double DCPeriod;

   if( startIdx < 0 )
      return TA_OUT_OF_RANGE_START_INDEX;
   if( (endIdx < 0) || (endIdx < startIdx) )
      return TA_OUT_OF_RANGE_END_INDEX;

   if( !inReal )
      return TA_BAD_PARAM;
   if( !outReal )
      return TA_BAD_PARAM;

   a = 0.0962;
   b = 0.5769;
   /* Variable used for the price smoother (a weighted moving average). */
   /* Variable to keep track of the last 3 ITrend */
   /* Variables used for the Hilbert Transormation */
   /* Variable used to calculate the dominant cycle phase */
   /* circular buffer already declared */
   iTrend3 = 0.0;
   iTrend2 = iTrend3;
   iTrend1 = iTrend2;
   /* Constant */
   tempReal = atan(1);
   rad2Deg = 45.0 / tempReal;
   /* Identify the minimum number of price bar needed
    * to calculate at least one output.
    */
   lookbackTotal = 63 + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_HT_TRENDLINE,Ht_trendline);
   /* Move up the start index if there is not
    * enough initial data.
    */
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   /* Make sure there is still something to evaluate. */
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   *outBegIdx= startIdx;
   /* Initialize the price smoother, which is simply a weighted
    * moving average of the price.
    * To understand this algorithm, I strongly suggest to understand
    * first how TA_WMA is done.
    */
   trailingWMAIdx = startIdx - lookbackTotal;
   today = trailingWMAIdx;
   /* Initialization is same as WMA, except loop is unrolled
    * for speed optimization.
    */
   tempReal = inReal[today++];
   periodWMASub = tempReal;
   periodWMASum = tempReal;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 2.0;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 3.0;
   trailingWMAValue = 0.0;
   /* Subsequent WMA value are evaluated by using
    * the DO_PRICE_WMA macro.
    */
   i = 34;
   do
   {
      tempReal = inReal[today++];
      periodWMASub += tempReal;
      periodWMASub -= trailingWMAValue;
      periodWMASum += tempReal * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
   } while( --i != 0 );
   /* Initialize the circular buffers used by the hilbert
    * transform logic.
    * A buffer is used for odd day and another for even days.
    * This minimize the number of memory access and floating point
    * operations needed (note also that by using static circular buffer,
    * no large dynamic memory allocation is needed for storing
    * intermediate calculation!).
    */
   hilbertIdx = 0;
   detrender_Odd[0] = 0.0;
   detrender_Odd[1] = 0.0;
   detrender_Odd[2] = 0.0;
   detrender_Even[0] = 0.0;
   detrender_Even[1] = 0.0;
   detrender_Even[2] = 0.0;
   detrender = 0.0;
   prev_detrender_Odd = 0.0;
   prev_detrender_Even = 0.0;
   prev_detrender_input_Odd = 0.0;
   prev_detrender_input_Even = 0.0;
   Q1_Odd[0] = 0.0;
   Q1_Odd[1] = 0.0;
   Q1_Odd[2] = 0.0;
   Q1_Even[0] = 0.0;
   Q1_Even[1] = 0.0;
   Q1_Even[2] = 0.0;
   Q1 = 0.0;
   prev_Q1_Odd = 0.0;
   prev_Q1_Even = 0.0;
   prev_Q1_input_Odd = 0.0;
   prev_Q1_input_Even = 0.0;
   jI_Odd[0] = 0.0;
   jI_Odd[1] = 0.0;
   jI_Odd[2] = 0.0;
   jI_Even[0] = 0.0;
   jI_Even[1] = 0.0;
   jI_Even[2] = 0.0;
   jI = 0.0;
   prev_jI_Odd = 0.0;
   prev_jI_Even = 0.0;
   prev_jI_input_Odd = 0.0;
   prev_jI_input_Even = 0.0;
   jQ_Odd[0] = 0.0;
   jQ_Odd[1] = 0.0;
   jQ_Odd[2] = 0.0;
   jQ_Even[0] = 0.0;
   jQ_Even[1] = 0.0;
   jQ_Even[2] = 0.0;
   jQ = 0.0;
   prev_jQ_Odd = 0.0;
   prev_jQ_Even = 0.0;
   prev_jQ_input_Odd = 0.0;
   prev_jQ_input_Even = 0.0;
   period = 0.0;
   outIdx = 0;
   prevQ2 = 0.0;
   prevI2 = prevQ2;
   Im = 0.0;
   Re = Im;
   I1ForEvenPrev3 = 0.0;
   I1ForOddPrev3 = I1ForEvenPrev3;
   I1ForEvenPrev2 = 0.0;
   I1ForOddPrev2 = I1ForEvenPrev2;
   smoothPeriod = 0.0;
   /* The code is speed optimized and is most likely very
    * hard to follow if you do not already know well the
    * original algorithm.
    * To understadn better, it is strongly suggested to look
    * first at the Excel implementation in "test_MAMA.xls" included
    * in this package.
    */
   while( today <= endIdx )
   {
      adjustedPrevPeriod = 0.075 * period + 0.54;
      todayValue = inReal[today];
      periodWMASub += todayValue;
      periodWMASub -= trailingWMAValue;
      periodWMASum += todayValue * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
      if( today % 2 == 0 )
      {
         /* Do the Hilbert Transforms for even price bar */
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Even[hilbertIdx];
         detrender_Even[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Even;
         prev_detrender_Even = b * prev_detrender_input_Even;
         detrender += prev_detrender_Even;
         prev_detrender_input_Even = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Even[hilbertIdx];
         Q1_Even[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Even;
         prev_Q1_Even = b * prev_Q1_input_Even;
         Q1 += prev_Q1_Even;
         prev_Q1_input_Even = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForEvenPrev3;
         jI = 0 - jI_Even[hilbertIdx];
         jI_Even[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Even;
         prev_jI_Even = b * prev_jI_input_Even;
         jI += prev_jI_Even;
         prev_jI_input_Even = I1ForEvenPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Even[hilbertIdx];
         jQ_Even[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Even;
         prev_jQ_Even = b * prev_jQ_input_Even;
         jQ += prev_jQ_Even;
         prev_jQ_input_Even = Q1;
         jQ *= adjustedPrevPeriod;
         if( ++hilbertIdx == 3 )
         {
            hilbertIdx = 0;
         }
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForEvenPrev3 - jQ) + 0.8 * prevI2;
         /* The variable I1 is the detrender delayed for
          * 3 price bars.
          *
          * Save the current detrender value for being
          * used by the "odd" logic later.
          */
         I1ForOddPrev3 = I1ForOddPrev2;
         I1ForOddPrev2 = detrender;
      } else 
      {
         /* Do the Hilbert Transforms for odd price bar */
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Odd[hilbertIdx];
         detrender_Odd[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Odd;
         prev_detrender_Odd = b * prev_detrender_input_Odd;
         detrender += prev_detrender_Odd;
         prev_detrender_input_Odd = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Odd[hilbertIdx];
         Q1_Odd[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Odd;
         prev_Q1_Odd = b * prev_Q1_input_Odd;
         Q1 += prev_Q1_Odd;
         prev_Q1_input_Odd = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForOddPrev3;
         jI = 0 - jI_Odd[hilbertIdx];
         jI_Odd[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Odd;
         prev_jI_Odd = b * prev_jI_input_Odd;
         jI += prev_jI_Odd;
         prev_jI_input_Odd = I1ForOddPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Odd[hilbertIdx];
         jQ_Odd[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Odd;
         prev_jQ_Odd = b * prev_jQ_input_Odd;
         jQ += prev_jQ_Odd;
         prev_jQ_input_Odd = Q1;
         jQ *= adjustedPrevPeriod;
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForOddPrev3 - jQ) + 0.8 * prevI2;
         /* The varaiable I1 is the detrender delayed for
          * 3 price bars.
          *
          * Save the current detrender value for being
          * used by the "even" logic later.
          */
         I1ForEvenPrev3 = I1ForEvenPrev2;
         I1ForEvenPrev2 = detrender;
      }
      /* Adjust the period for next price bar */
      Re = 0.2 * (I2 * prevI2 + Q2 * prevQ2) + 0.8 * Re;
      Im = 0.2 * (I2 * prevQ2 - Q2 * prevI2) + 0.8 * Im;
      prevQ2 = Q2;
      prevI2 = I2;
      tempReal = period;
      if( Im != 0.0 && Re != 0.0 )
      {
         period = 360.0 / (atan(Im / Re) * rad2Deg);
      }
      tempReal2 = 1.5 * tempReal;
      if( period > tempReal2 )
      {
         period = tempReal2;
      }
      tempReal2 = 0.67 * tempReal;
      if( period < tempReal2 )
      {
         period = tempReal2;
      }
      if( period < 6 )
      {
         period = 6;
      } else if( period > 50 )
      {
         period = 50;
      }
      period = 0.2 * period + 0.8 * tempReal;
      smoothPeriod = 0.33 * period + 0.67 * smoothPeriod;
      /* Compute Trendline */
      DCPeriod = smoothPeriod + 0.5;
      DCPeriodInt = (int)DCPeriod;
      /* Average the RAW price over the dominant cycle period
       * (Ehlers, "Rocket Science for Traders": the Instantaneous
       * Trendline sums Price — not SmoothPrice, which only feeds
       * the Hilbert detrender above). See issue #88.
       */
      idx = today;
      tempReal = 0.0;
      for( i = 0; i < DCPeriodInt; i += 1 )
      {
         tempReal += inReal[idx--];
      }
      if( DCPeriodInt > 0 )
      {
         tempReal = tempReal / (double)DCPeriodInt;
      }
      tempReal2 = (4.0 * tempReal + 3.0 * iTrend1 + 2.0 * iTrend2 + iTrend3) / 10.0;
      iTrend3 = iTrend2;
      iTrend2 = iTrend1;
      iTrend1 = tempReal;
      if( today >= startIdx )
      {
         outReal[outIdx++] = tempReal2;
      }
      /* Ooof... let's do the next price bar now! */
      today += 1;
   }
   *outNBElement= outIdx;
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_HT_TRENDLINE_Unguarded( int    startIdx,
                                                 int    endIdx,
                                                 const double inReal[],
                                                 int          *outBegIdx,
                                                 int          *outNBElement,
                                                 double        outReal[] )
{
   int outIdx;
   int i;
   int lookbackTotal;
   int today;
   double tempReal;
   double tempReal2;
   double adjustedPrevPeriod;
   double period;
   int trailingWMAIdx;
   double periodWMASum;
   double periodWMASub;
   double trailingWMAValue;
   double smoothedValue;
   double iTrend1;
   double iTrend2;
   double iTrend3;
   double a;
   double b;
   double hilbertTempReal;
   int hilbertIdx;
   double detrender_Odd[3];
   double detrender_Even[3];
   double detrender;
   double prev_detrender_Odd;
   double prev_detrender_Even;
   double prev_detrender_input_Odd;
   double prev_detrender_input_Even;
   double Q1_Odd[3];
   double Q1_Even[3];
   double Q1;
   double prev_Q1_Odd;
   double prev_Q1_Even;
   double prev_Q1_input_Odd;
   double prev_Q1_input_Even;
   double jI_Odd[3];
   double jI_Even[3];
   double jI;
   double prev_jI_Odd;
   double prev_jI_Even;
   double prev_jI_input_Odd;
   double prev_jI_input_Even;
   double jQ_Odd[3];
   double jQ_Even[3];
   double jQ;
   double prev_jQ_Odd;
   double prev_jQ_Even;
   double prev_jQ_input_Odd;
   double prev_jQ_input_Even;
   double Q2;
   double I2;
   double prevQ2;
   double prevI2;
   double Re;
   double Im;
   double I1ForOddPrev2;
   double I1ForOddPrev3;
   double I1ForEvenPrev2;
   double I1ForEvenPrev3;
   double rad2Deg;
   double todayValue;
   double smoothPeriod;
   int idx;
   int DCPeriodInt;
   double DCPeriod;

   a = 0.0962;
   b = 0.5769;
   iTrend3 = 0.0;
   iTrend2 = iTrend3;
   iTrend1 = iTrend2;
   tempReal = atan(1);
   rad2Deg = 45.0 / tempReal;
   lookbackTotal = 63 + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_HT_TRENDLINE,Ht_trendline);
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   *outBegIdx= startIdx;
   trailingWMAIdx = startIdx - lookbackTotal;
   today = trailingWMAIdx;
   tempReal = inReal[today++];
   periodWMASub = tempReal;
   periodWMASum = tempReal;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 2.0;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 3.0;
   trailingWMAValue = 0.0;
   i = 34;
   do
   {
      tempReal = inReal[today++];
      periodWMASub += tempReal;
      periodWMASub -= trailingWMAValue;
      periodWMASum += tempReal * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
   } while( --i != 0 );
   hilbertIdx = 0;
   detrender_Odd[0] = 0.0;
   detrender_Odd[1] = 0.0;
   detrender_Odd[2] = 0.0;
   detrender_Even[0] = 0.0;
   detrender_Even[1] = 0.0;
   detrender_Even[2] = 0.0;
   detrender = 0.0;
   prev_detrender_Odd = 0.0;
   prev_detrender_Even = 0.0;
   prev_detrender_input_Odd = 0.0;
   prev_detrender_input_Even = 0.0;
   Q1_Odd[0] = 0.0;
   Q1_Odd[1] = 0.0;
   Q1_Odd[2] = 0.0;
   Q1_Even[0] = 0.0;
   Q1_Even[1] = 0.0;
   Q1_Even[2] = 0.0;
   Q1 = 0.0;
   prev_Q1_Odd = 0.0;
   prev_Q1_Even = 0.0;
   prev_Q1_input_Odd = 0.0;
   prev_Q1_input_Even = 0.0;
   jI_Odd[0] = 0.0;
   jI_Odd[1] = 0.0;
   jI_Odd[2] = 0.0;
   jI_Even[0] = 0.0;
   jI_Even[1] = 0.0;
   jI_Even[2] = 0.0;
   jI = 0.0;
   prev_jI_Odd = 0.0;
   prev_jI_Even = 0.0;
   prev_jI_input_Odd = 0.0;
   prev_jI_input_Even = 0.0;
   jQ_Odd[0] = 0.0;
   jQ_Odd[1] = 0.0;
   jQ_Odd[2] = 0.0;
   jQ_Even[0] = 0.0;
   jQ_Even[1] = 0.0;
   jQ_Even[2] = 0.0;
   jQ = 0.0;
   prev_jQ_Odd = 0.0;
   prev_jQ_Even = 0.0;
   prev_jQ_input_Odd = 0.0;
   prev_jQ_input_Even = 0.0;
   period = 0.0;
   outIdx = 0;
   prevQ2 = 0.0;
   prevI2 = prevQ2;
   Im = 0.0;
   Re = Im;
   I1ForEvenPrev3 = 0.0;
   I1ForOddPrev3 = I1ForEvenPrev3;
   I1ForEvenPrev2 = 0.0;
   I1ForOddPrev2 = I1ForEvenPrev2;
   smoothPeriod = 0.0;
   while( today <= endIdx )
   {
      adjustedPrevPeriod = 0.075 * period + 0.54;
      todayValue = inReal[today];
      periodWMASub += todayValue;
      periodWMASub -= trailingWMAValue;
      periodWMASum += todayValue * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
      if( today % 2 == 0 )
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Even[hilbertIdx];
         detrender_Even[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Even;
         prev_detrender_Even = b * prev_detrender_input_Even;
         detrender += prev_detrender_Even;
         prev_detrender_input_Even = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Even[hilbertIdx];
         Q1_Even[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Even;
         prev_Q1_Even = b * prev_Q1_input_Even;
         Q1 += prev_Q1_Even;
         prev_Q1_input_Even = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForEvenPrev3;
         jI = 0 - jI_Even[hilbertIdx];
         jI_Even[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Even;
         prev_jI_Even = b * prev_jI_input_Even;
         jI += prev_jI_Even;
         prev_jI_input_Even = I1ForEvenPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Even[hilbertIdx];
         jQ_Even[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Even;
         prev_jQ_Even = b * prev_jQ_input_Even;
         jQ += prev_jQ_Even;
         prev_jQ_input_Even = Q1;
         jQ *= adjustedPrevPeriod;
         if( ++hilbertIdx == 3 )
         {
            hilbertIdx = 0;
         }
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForEvenPrev3 - jQ) + 0.8 * prevI2;
         I1ForOddPrev3 = I1ForOddPrev2;
         I1ForOddPrev2 = detrender;
      } else 
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Odd[hilbertIdx];
         detrender_Odd[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Odd;
         prev_detrender_Odd = b * prev_detrender_input_Odd;
         detrender += prev_detrender_Odd;
         prev_detrender_input_Odd = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Odd[hilbertIdx];
         Q1_Odd[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Odd;
         prev_Q1_Odd = b * prev_Q1_input_Odd;
         Q1 += prev_Q1_Odd;
         prev_Q1_input_Odd = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForOddPrev3;
         jI = 0 - jI_Odd[hilbertIdx];
         jI_Odd[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Odd;
         prev_jI_Odd = b * prev_jI_input_Odd;
         jI += prev_jI_Odd;
         prev_jI_input_Odd = I1ForOddPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Odd[hilbertIdx];
         jQ_Odd[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Odd;
         prev_jQ_Odd = b * prev_jQ_input_Odd;
         jQ += prev_jQ_Odd;
         prev_jQ_input_Odd = Q1;
         jQ *= adjustedPrevPeriod;
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForOddPrev3 - jQ) + 0.8 * prevI2;
         I1ForEvenPrev3 = I1ForEvenPrev2;
         I1ForEvenPrev2 = detrender;
      }
      Re = 0.2 * (I2 * prevI2 + Q2 * prevQ2) + 0.8 * Re;
      Im = 0.2 * (I2 * prevQ2 - Q2 * prevI2) + 0.8 * Im;
      prevQ2 = Q2;
      prevI2 = I2;
      tempReal = period;
      if( Im != 0.0 && Re != 0.0 )
      {
         period = 360.0 / (atan(Im / Re) * rad2Deg);
      }
      tempReal2 = 1.5 * tempReal;
      if( period > tempReal2 )
      {
         period = tempReal2;
      }
      tempReal2 = 0.67 * tempReal;
      if( period < tempReal2 )
      {
         period = tempReal2;
      }
      if( period < 6 )
      {
         period = 6;
      } else if( period > 50 )
      {
         period = 50;
      }
      period = 0.2 * period + 0.8 * tempReal;
      smoothPeriod = 0.33 * period + 0.67 * smoothPeriod;
      DCPeriod = smoothPeriod + 0.5;
      DCPeriodInt = (int)DCPeriod;
      idx = today;
      tempReal = 0.0;
      for( i = 0; i < DCPeriodInt; i += 1 )
      {
         tempReal += inReal[idx--];
      }
      if( DCPeriodInt > 0 )
      {
         tempReal = tempReal / (double)DCPeriodInt;
      }
      tempReal2 = (4.0 * tempReal + 3.0 * iTrend1 + 2.0 * iTrend2 + iTrend3) / 10.0;
      iTrend3 = iTrend2;
      iTrend2 = iTrend1;
      iTrend1 = tempReal;
      if( today >= startIdx )
      {
         outReal[outIdx++] = tempReal2;
      }
      today += 1;
   }
   *outNBElement= outIdx;
   return TA_SUCCESS;
}

TA_RetCode TA_S_HT_TRENDLINE( int    startIdx,
                              int    endIdx,
                              const float inReal[],
                              int          *outBegIdx,
                              int          *outNBElement,
                              double        outReal[] )
{
   int outIdx;
   int i;
   int lookbackTotal;
   int today;
   double tempReal;
   double tempReal2;
   double adjustedPrevPeriod;
   double period;
   int trailingWMAIdx;
   double periodWMASum;
   double periodWMASub;
   double trailingWMAValue;
   double smoothedValue;
   double iTrend1;
   double iTrend2;
   double iTrend3;
   double a;
   double b;
   double hilbertTempReal;
   int hilbertIdx;
   double detrender_Odd[3];
   double detrender_Even[3];
   double detrender;
   double prev_detrender_Odd;
   double prev_detrender_Even;
   double prev_detrender_input_Odd;
   double prev_detrender_input_Even;
   double Q1_Odd[3];
   double Q1_Even[3];
   double Q1;
   double prev_Q1_Odd;
   double prev_Q1_Even;
   double prev_Q1_input_Odd;
   double prev_Q1_input_Even;
   double jI_Odd[3];
   double jI_Even[3];
   double jI;
   double prev_jI_Odd;
   double prev_jI_Even;
   double prev_jI_input_Odd;
   double prev_jI_input_Even;
   double jQ_Odd[3];
   double jQ_Even[3];
   double jQ;
   double prev_jQ_Odd;
   double prev_jQ_Even;
   double prev_jQ_input_Odd;
   double prev_jQ_input_Even;
   double Q2;
   double I2;
   double prevQ2;
   double prevI2;
   double Re;
   double Im;
   double I1ForOddPrev2;
   double I1ForOddPrev3;
   double I1ForEvenPrev2;
   double I1ForEvenPrev3;
   double rad2Deg;
   double todayValue;
   double smoothPeriod;
   int idx;
   int DCPeriodInt;
   double DCPeriod;

   if( startIdx < 0 )
      return TA_OUT_OF_RANGE_START_INDEX;
   if( (endIdx < 0) || (endIdx < startIdx) )
      return TA_OUT_OF_RANGE_END_INDEX;

   if( !inReal )
      return TA_BAD_PARAM;
   if( !outReal )
      return TA_BAD_PARAM;

   a = 0.0962;
   b = 0.5769;
   iTrend3 = 0.0;
   iTrend2 = iTrend3;
   iTrend1 = iTrend2;
   tempReal = atan(1);
   rad2Deg = 45.0 / tempReal;
   lookbackTotal = 63 + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_HT_TRENDLINE,Ht_trendline);
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   *outBegIdx= startIdx;
   trailingWMAIdx = startIdx - lookbackTotal;
   today = trailingWMAIdx;
   tempReal = inReal[today++];
   periodWMASub = tempReal;
   periodWMASum = tempReal;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 2.0;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 3.0;
   trailingWMAValue = 0.0;
   i = 34;
   do
   {
      tempReal = inReal[today++];
      periodWMASub += tempReal;
      periodWMASub -= trailingWMAValue;
      periodWMASum += tempReal * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
   } while( --i != 0 );
   hilbertIdx = 0;
   detrender_Odd[0] = 0.0;
   detrender_Odd[1] = 0.0;
   detrender_Odd[2] = 0.0;
   detrender_Even[0] = 0.0;
   detrender_Even[1] = 0.0;
   detrender_Even[2] = 0.0;
   detrender = 0.0;
   prev_detrender_Odd = 0.0;
   prev_detrender_Even = 0.0;
   prev_detrender_input_Odd = 0.0;
   prev_detrender_input_Even = 0.0;
   Q1_Odd[0] = 0.0;
   Q1_Odd[1] = 0.0;
   Q1_Odd[2] = 0.0;
   Q1_Even[0] = 0.0;
   Q1_Even[1] = 0.0;
   Q1_Even[2] = 0.0;
   Q1 = 0.0;
   prev_Q1_Odd = 0.0;
   prev_Q1_Even = 0.0;
   prev_Q1_input_Odd = 0.0;
   prev_Q1_input_Even = 0.0;
   jI_Odd[0] = 0.0;
   jI_Odd[1] = 0.0;
   jI_Odd[2] = 0.0;
   jI_Even[0] = 0.0;
   jI_Even[1] = 0.0;
   jI_Even[2] = 0.0;
   jI = 0.0;
   prev_jI_Odd = 0.0;
   prev_jI_Even = 0.0;
   prev_jI_input_Odd = 0.0;
   prev_jI_input_Even = 0.0;
   jQ_Odd[0] = 0.0;
   jQ_Odd[1] = 0.0;
   jQ_Odd[2] = 0.0;
   jQ_Even[0] = 0.0;
   jQ_Even[1] = 0.0;
   jQ_Even[2] = 0.0;
   jQ = 0.0;
   prev_jQ_Odd = 0.0;
   prev_jQ_Even = 0.0;
   prev_jQ_input_Odd = 0.0;
   prev_jQ_input_Even = 0.0;
   period = 0.0;
   outIdx = 0;
   prevQ2 = 0.0;
   prevI2 = prevQ2;
   Im = 0.0;
   Re = Im;
   I1ForEvenPrev3 = 0.0;
   I1ForOddPrev3 = I1ForEvenPrev3;
   I1ForEvenPrev2 = 0.0;
   I1ForOddPrev2 = I1ForEvenPrev2;
   smoothPeriod = 0.0;
   while( today <= endIdx )
   {
      adjustedPrevPeriod = 0.075 * period + 0.54;
      todayValue = inReal[today];
      periodWMASub += todayValue;
      periodWMASub -= trailingWMAValue;
      periodWMASum += todayValue * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
      if( today % 2 == 0 )
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Even[hilbertIdx];
         detrender_Even[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Even;
         prev_detrender_Even = b * prev_detrender_input_Even;
         detrender += prev_detrender_Even;
         prev_detrender_input_Even = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Even[hilbertIdx];
         Q1_Even[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Even;
         prev_Q1_Even = b * prev_Q1_input_Even;
         Q1 += prev_Q1_Even;
         prev_Q1_input_Even = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForEvenPrev3;
         jI = 0 - jI_Even[hilbertIdx];
         jI_Even[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Even;
         prev_jI_Even = b * prev_jI_input_Even;
         jI += prev_jI_Even;
         prev_jI_input_Even = I1ForEvenPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Even[hilbertIdx];
         jQ_Even[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Even;
         prev_jQ_Even = b * prev_jQ_input_Even;
         jQ += prev_jQ_Even;
         prev_jQ_input_Even = Q1;
         jQ *= adjustedPrevPeriod;
         if( ++hilbertIdx == 3 )
         {
            hilbertIdx = 0;
         }
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForEvenPrev3 - jQ) + 0.8 * prevI2;
         I1ForOddPrev3 = I1ForOddPrev2;
         I1ForOddPrev2 = detrender;
      } else 
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Odd[hilbertIdx];
         detrender_Odd[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Odd;
         prev_detrender_Odd = b * prev_detrender_input_Odd;
         detrender += prev_detrender_Odd;
         prev_detrender_input_Odd = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Odd[hilbertIdx];
         Q1_Odd[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Odd;
         prev_Q1_Odd = b * prev_Q1_input_Odd;
         Q1 += prev_Q1_Odd;
         prev_Q1_input_Odd = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForOddPrev3;
         jI = 0 - jI_Odd[hilbertIdx];
         jI_Odd[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Odd;
         prev_jI_Odd = b * prev_jI_input_Odd;
         jI += prev_jI_Odd;
         prev_jI_input_Odd = I1ForOddPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Odd[hilbertIdx];
         jQ_Odd[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Odd;
         prev_jQ_Odd = b * prev_jQ_input_Odd;
         jQ += prev_jQ_Odd;
         prev_jQ_input_Odd = Q1;
         jQ *= adjustedPrevPeriod;
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForOddPrev3 - jQ) + 0.8 * prevI2;
         I1ForEvenPrev3 = I1ForEvenPrev2;
         I1ForEvenPrev2 = detrender;
      }
      Re = 0.2 * (I2 * prevI2 + Q2 * prevQ2) + 0.8 * Re;
      Im = 0.2 * (I2 * prevQ2 - Q2 * prevI2) + 0.8 * Im;
      prevQ2 = Q2;
      prevI2 = I2;
      tempReal = period;
      if( Im != 0.0 && Re != 0.0 )
      {
         period = 360.0 / (atan(Im / Re) * rad2Deg);
      }
      tempReal2 = 1.5 * tempReal;
      if( period > tempReal2 )
      {
         period = tempReal2;
      }
      tempReal2 = 0.67 * tempReal;
      if( period < tempReal2 )
      {
         period = tempReal2;
      }
      if( period < 6 )
      {
         period = 6;
      } else if( period > 50 )
      {
         period = 50;
      }
      period = 0.2 * period + 0.8 * tempReal;
      smoothPeriod = 0.33 * period + 0.67 * smoothPeriod;
      DCPeriod = smoothPeriod + 0.5;
      DCPeriodInt = (int)DCPeriod;
      idx = today;
      tempReal = 0.0;
      for( i = 0; i < DCPeriodInt; i += 1 )
      {
         tempReal += inReal[idx--];
      }
      if( DCPeriodInt > 0 )
      {
         tempReal = tempReal / (double)DCPeriodInt;
      }
      tempReal2 = (4.0 * tempReal + 3.0 * iTrend1 + 2.0 * iTrend2 + iTrend3) / 10.0;
      iTrend3 = iTrend2;
      iTrend2 = iTrend1;
      iTrend1 = tempReal;
      if( today >= startIdx )
      {
         outReal[outIdx++] = tempReal2;
      }
      today += 1;
   }
   *outNBElement= outIdx;
   return TA_SUCCESS;
}

TA_RetCode TA_S_HT_TRENDLINE_Unguarded( int    startIdx,
                                        int    endIdx,
                                        const float inReal[],
                                        int          *outBegIdx,
                                        int          *outNBElement,
                                        double        outReal[] )
{
   int outIdx;
   int i;
   int lookbackTotal;
   int today;
   double tempReal;
   double tempReal2;
   double adjustedPrevPeriod;
   double period;
   int trailingWMAIdx;
   double periodWMASum;
   double periodWMASub;
   double trailingWMAValue;
   double smoothedValue;
   double iTrend1;
   double iTrend2;
   double iTrend3;
   double a;
   double b;
   double hilbertTempReal;
   int hilbertIdx;
   double detrender_Odd[3];
   double detrender_Even[3];
   double detrender;
   double prev_detrender_Odd;
   double prev_detrender_Even;
   double prev_detrender_input_Odd;
   double prev_detrender_input_Even;
   double Q1_Odd[3];
   double Q1_Even[3];
   double Q1;
   double prev_Q1_Odd;
   double prev_Q1_Even;
   double prev_Q1_input_Odd;
   double prev_Q1_input_Even;
   double jI_Odd[3];
   double jI_Even[3];
   double jI;
   double prev_jI_Odd;
   double prev_jI_Even;
   double prev_jI_input_Odd;
   double prev_jI_input_Even;
   double jQ_Odd[3];
   double jQ_Even[3];
   double jQ;
   double prev_jQ_Odd;
   double prev_jQ_Even;
   double prev_jQ_input_Odd;
   double prev_jQ_input_Even;
   double Q2;
   double I2;
   double prevQ2;
   double prevI2;
   double Re;
   double Im;
   double I1ForOddPrev2;
   double I1ForOddPrev3;
   double I1ForEvenPrev2;
   double I1ForEvenPrev3;
   double rad2Deg;
   double todayValue;
   double smoothPeriod;
   int idx;
   int DCPeriodInt;
   double DCPeriod;

   a = 0.0962;
   b = 0.5769;
   iTrend3 = 0.0;
   iTrend2 = iTrend3;
   iTrend1 = iTrend2;
   tempReal = atan(1);
   rad2Deg = 45.0 / tempReal;
   lookbackTotal = 63 + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_HT_TRENDLINE,Ht_trendline);
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   *outBegIdx= startIdx;
   trailingWMAIdx = startIdx - lookbackTotal;
   today = trailingWMAIdx;
   tempReal = inReal[today++];
   periodWMASub = tempReal;
   periodWMASum = tempReal;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 2.0;
   tempReal = inReal[today++];
   periodWMASub += tempReal;
   periodWMASum += tempReal * 3.0;
   trailingWMAValue = 0.0;
   i = 34;
   do
   {
      tempReal = inReal[today++];
      periodWMASub += tempReal;
      periodWMASub -= trailingWMAValue;
      periodWMASum += tempReal * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
   } while( --i != 0 );
   hilbertIdx = 0;
   detrender_Odd[0] = 0.0;
   detrender_Odd[1] = 0.0;
   detrender_Odd[2] = 0.0;
   detrender_Even[0] = 0.0;
   detrender_Even[1] = 0.0;
   detrender_Even[2] = 0.0;
   detrender = 0.0;
   prev_detrender_Odd = 0.0;
   prev_detrender_Even = 0.0;
   prev_detrender_input_Odd = 0.0;
   prev_detrender_input_Even = 0.0;
   Q1_Odd[0] = 0.0;
   Q1_Odd[1] = 0.0;
   Q1_Odd[2] = 0.0;
   Q1_Even[0] = 0.0;
   Q1_Even[1] = 0.0;
   Q1_Even[2] = 0.0;
   Q1 = 0.0;
   prev_Q1_Odd = 0.0;
   prev_Q1_Even = 0.0;
   prev_Q1_input_Odd = 0.0;
   prev_Q1_input_Even = 0.0;
   jI_Odd[0] = 0.0;
   jI_Odd[1] = 0.0;
   jI_Odd[2] = 0.0;
   jI_Even[0] = 0.0;
   jI_Even[1] = 0.0;
   jI_Even[2] = 0.0;
   jI = 0.0;
   prev_jI_Odd = 0.0;
   prev_jI_Even = 0.0;
   prev_jI_input_Odd = 0.0;
   prev_jI_input_Even = 0.0;
   jQ_Odd[0] = 0.0;
   jQ_Odd[1] = 0.0;
   jQ_Odd[2] = 0.0;
   jQ_Even[0] = 0.0;
   jQ_Even[1] = 0.0;
   jQ_Even[2] = 0.0;
   jQ = 0.0;
   prev_jQ_Odd = 0.0;
   prev_jQ_Even = 0.0;
   prev_jQ_input_Odd = 0.0;
   prev_jQ_input_Even = 0.0;
   period = 0.0;
   outIdx = 0;
   prevQ2 = 0.0;
   prevI2 = prevQ2;
   Im = 0.0;
   Re = Im;
   I1ForEvenPrev3 = 0.0;
   I1ForOddPrev3 = I1ForEvenPrev3;
   I1ForEvenPrev2 = 0.0;
   I1ForOddPrev2 = I1ForEvenPrev2;
   smoothPeriod = 0.0;
   while( today <= endIdx )
   {
      adjustedPrevPeriod = 0.075 * period + 0.54;
      todayValue = inReal[today];
      periodWMASub += todayValue;
      periodWMASub -= trailingWMAValue;
      periodWMASum += todayValue * 4.0;
      trailingWMAValue = inReal[trailingWMAIdx++];
      smoothedValue = periodWMASum * 0.1;
      periodWMASum -= periodWMASub;
      if( today % 2 == 0 )
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Even[hilbertIdx];
         detrender_Even[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Even;
         prev_detrender_Even = b * prev_detrender_input_Even;
         detrender += prev_detrender_Even;
         prev_detrender_input_Even = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Even[hilbertIdx];
         Q1_Even[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Even;
         prev_Q1_Even = b * prev_Q1_input_Even;
         Q1 += prev_Q1_Even;
         prev_Q1_input_Even = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForEvenPrev3;
         jI = 0 - jI_Even[hilbertIdx];
         jI_Even[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Even;
         prev_jI_Even = b * prev_jI_input_Even;
         jI += prev_jI_Even;
         prev_jI_input_Even = I1ForEvenPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Even[hilbertIdx];
         jQ_Even[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Even;
         prev_jQ_Even = b * prev_jQ_input_Even;
         jQ += prev_jQ_Even;
         prev_jQ_input_Even = Q1;
         jQ *= adjustedPrevPeriod;
         if( ++hilbertIdx == 3 )
         {
            hilbertIdx = 0;
         }
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForEvenPrev3 - jQ) + 0.8 * prevI2;
         I1ForOddPrev3 = I1ForOddPrev2;
         I1ForOddPrev2 = detrender;
      } else 
      {
         hilbertTempReal = a * smoothedValue;
         detrender = 0 - detrender_Odd[hilbertIdx];
         detrender_Odd[hilbertIdx] = hilbertTempReal;
         detrender += hilbertTempReal;
         detrender -= prev_detrender_Odd;
         prev_detrender_Odd = b * prev_detrender_input_Odd;
         detrender += prev_detrender_Odd;
         prev_detrender_input_Odd = smoothedValue;
         detrender *= adjustedPrevPeriod;
         hilbertTempReal = a * detrender;
         Q1 = 0 - Q1_Odd[hilbertIdx];
         Q1_Odd[hilbertIdx] = hilbertTempReal;
         Q1 += hilbertTempReal;
         Q1 -= prev_Q1_Odd;
         prev_Q1_Odd = b * prev_Q1_input_Odd;
         Q1 += prev_Q1_Odd;
         prev_Q1_input_Odd = detrender;
         Q1 *= adjustedPrevPeriod;
         hilbertTempReal = a * I1ForOddPrev3;
         jI = 0 - jI_Odd[hilbertIdx];
         jI_Odd[hilbertIdx] = hilbertTempReal;
         jI += hilbertTempReal;
         jI -= prev_jI_Odd;
         prev_jI_Odd = b * prev_jI_input_Odd;
         jI += prev_jI_Odd;
         prev_jI_input_Odd = I1ForOddPrev3;
         jI *= adjustedPrevPeriod;
         hilbertTempReal = a * Q1;
         jQ = 0 - jQ_Odd[hilbertIdx];
         jQ_Odd[hilbertIdx] = hilbertTempReal;
         jQ += hilbertTempReal;
         jQ -= prev_jQ_Odd;
         prev_jQ_Odd = b * prev_jQ_input_Odd;
         jQ += prev_jQ_Odd;
         prev_jQ_input_Odd = Q1;
         jQ *= adjustedPrevPeriod;
         Q2 = 0.2 * (Q1 + jI) + 0.8 * prevQ2;
         I2 = 0.2 * (I1ForOddPrev3 - jQ) + 0.8 * prevI2;
         I1ForEvenPrev3 = I1ForEvenPrev2;
         I1ForEvenPrev2 = detrender;
      }
      Re = 0.2 * (I2 * prevI2 + Q2 * prevQ2) + 0.8 * Re;
      Im = 0.2 * (I2 * prevQ2 - Q2 * prevI2) + 0.8 * Im;
      prevQ2 = Q2;
      prevI2 = I2;
      tempReal = period;
      if( Im != 0.0 && Re != 0.0 )
      {
         period = 360.0 / (atan(Im / Re) * rad2Deg);
      }
      tempReal2 = 1.5 * tempReal;
      if( period > tempReal2 )
      {
         period = tempReal2;
      }
      tempReal2 = 0.67 * tempReal;
      if( period < tempReal2 )
      {
         period = tempReal2;
      }
      if( period < 6 )
      {
         period = 6;
      } else if( period > 50 )
      {
         period = 50;
      }
      period = 0.2 * period + 0.8 * tempReal;
      smoothPeriod = 0.33 * period + 0.67 * smoothPeriod;
      DCPeriod = smoothPeriod + 0.5;
      DCPeriodInt = (int)DCPeriod;
      idx = today;
      tempReal = 0.0;
      for( i = 0; i < DCPeriodInt; i += 1 )
      {
         tempReal += inReal[idx--];
      }
      if( DCPeriodInt > 0 )
      {
         tempReal = tempReal / (double)DCPeriodInt;
      }
      tempReal2 = (4.0 * tempReal + 3.0 * iTrend1 + 2.0 * iTrend2 + iTrend3) / 10.0;
      iTrend3 = iTrend2;
      iTrend2 = iTrend1;
      iTrend1 = tempReal;
      if( today >= startIdx )
      {
         outReal[outIdx++] = tempReal2;
      }
      today += 1;
   }
   *outNBElement= outIdx;
   return TA_SUCCESS;
}

