ta_cdl3blackcrows.c

股票主要技术指标源码

   /* Make sure there is still something to evaluate. */
   if( startIdx > endIdx )
   {
      VALUE_HANDLE_DEREF_TO_ZERO(outBegIdx);
      VALUE_HANDLE_DEREF_TO_ZERO(outNBElement);
      return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
   }

   /* Do the calculation using tight loops. */
   /* Add-up the initial period, except for the last value. */
   ShadowVeryShortPeriodTotal[2] = 0;
   ShadowVeryShortPeriodTotal[1] = 0;
   ShadowVeryShortPeriodTotal[0] = 0;
   ShadowVeryShortTrailingIdx = startIdx - TA_CANDLEAVGPERIOD(ShadowVeryShort);
   
   i = ShadowVeryShortTrailingIdx;
   while( i < startIdx ) {
        ShadowVeryShortPeriodTotal[2] += TA_CANDLERANGE( ShadowVeryShort, i-2 );
        ShadowVeryShortPeriodTotal[1] += TA_CANDLERANGE( ShadowVeryShort, i-1 );
        ShadowVeryShortPeriodTotal[0] += TA_CANDLERANGE( ShadowVeryShort, i );
        i++;
   }
   i = startIdx;

   /* Proceed with the calculation for the requested range.
    * Must have:
    * - three consecutive and declining black candlesticks
    * - each candle must have no or very short lower shadow
    * - each candle after the first must open within the prior candle's real body
    * - the first candle's close should be under the prior white candle's high
    * The meaning of "very short" is specified with TA_SetCandleSettings
    * outInteger is negative (-1 to -100): three black crows is always bearish; 
    * the user should consider that 3 black crows is significant when it appears after a mature advance or at high levels, 
    * while this function does not consider it
    */
   outIdx = 0;
   do
   {
        if( TA_CANDLECOLOR(i-3) == 1 &&                                         // white
            TA_CANDLECOLOR(i-2) == -1 &&                                        // 1st black
            TA_LOWERSHADOW(i-2) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[2], i-2 ) &&     
                                                                                // very short lower shadow
            TA_CANDLECOLOR(i-1) == -1 &&                                        // 2nd black
            TA_LOWERSHADOW(i-1) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[1], i-1 ) &&     
                                                                                // very short lower shadow
            TA_CANDLECOLOR(i) == -1 &&                                          // 3rd black
            TA_LOWERSHADOW(i) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[0], i ) &&         
                                                                                // very short lower shadow
            inOpen[i-1] < inOpen[i-2] && inOpen[i-1] > inClose[i-2] &&          // 2nd black opens within 1st black's rb
            inOpen[i] < inOpen[i-1] && inOpen[i] > inClose[i-1] &&              // 3rd black opens within 2nd black's rb
            inHigh[i-3] > inClose[i-2] &&                                       // 1st black closes under prior candle's high
            inClose[i-2] > inClose[i-1] &&                                      // three declining
            inClose[i-1] > inClose[i]                                           // three declining
          )
            outInteger[outIdx++] = -100;
        else
            outInteger[outIdx++] = 0;
        /* add the current range and subtract the first range: this is done after the pattern recognition 
         * when avgPeriod is not 0, that means "compare with the previous candles" (it excludes the current candle)
         */
        for (totIdx = 2; totIdx >= 0; --totIdx)
            ShadowVeryShortPeriodTotal[totIdx] += TA_CANDLERANGE( ShadowVeryShort, i-totIdx ) 
                                                - TA_CANDLERANGE( ShadowVeryShort, ShadowVeryShortTrailingIdx-totIdx );
        i++; 
        ShadowVeryShortTrailingIdx++;
   } while( i <= endIdx );

   /* All done. Indicate the output limits and return. */
   VALUE_HANDLE_DEREF(outNBElement) = outIdx;
   VALUE_HANDLE_DEREF(outBegIdx)    = startIdx;

   return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
}

/**** START GENCODE SECTION 5 - DO NOT DELETE THIS LINE ****/
/* Generated */ 
/* Generated */ #define  USE_SINGLE_PRECISION_INPUT
/* Generated */ #if !defined( _MANAGED ) && !defined( _JAVA )
/* Generated */    #undef   TA_PREFIX
/* Generated */    #define  TA_PREFIX(x) TA_S_##x
/* Generated */ #endif
/* Generated */ #undef   INPUT_TYPE
/* Generated */ #define  INPUT_TYPE float
/* Generated */ #if defined( _MANAGED )
/* Generated */ enum class Core::RetCode Core::Cdl3BlackCrows( int    startIdx,
/* Generated */                                                int    endIdx,
/* Generated */                                                cli::array<float>^ inOpen,
/* Generated */                                                cli::array<float>^ inHigh,
/* Generated */                                                cli::array<float>^ inLow,
/* Generated */                                                cli::array<float>^ inClose,
/* Generated */                                                [Out]int%    outBegIdx,
/* Generated */                                                [Out]int%    outNBElement,
/* Generated */                                                cli::array<int>^  outInteger )
/* Generated */ #elif defined( _JAVA )
/* Generated */ public RetCode cdl3BlackCrows( int    startIdx,
/* Generated */                                int    endIdx,
/* Generated */                                float        inOpen[],
/* Generated */                                float        inHigh[],
/* Generated */                                float        inLow[],
/* Generated */                                float        inClose[],
/* Generated */                                MInteger     outBegIdx,
/* Generated */                                MInteger     outNBElement,
/* Generated */                                int           outInteger[] )
/* Generated */ #else
/* Generated */ TA_RetCode TA_S_CDL3BLACKCROWS( int    startIdx,
/* Generated */                                 int    endIdx,
/* Generated */                                 const float  inOpen[],
/* Generated */                                 const float  inHigh[],
/* Generated */                                 const float  inLow[],
/* Generated */                                 const float  inClose[],
/* Generated */                                 int          *outBegIdx,
/* Generated */                                 int          *outNBElement,
/* Generated */                                 int           outInteger[] )
/* Generated */ #endif
/* Generated */ {
/* Generated */     ARRAY_LOCAL(ShadowVeryShortPeriodTotal,3);
/* Generated */     int i, outIdx, totIdx, ShadowVeryShortTrailingIdx, lookbackTotal;
/* Generated */  #ifndef TA_FUNC_NO_RANGE_CHECK
/* Generated */     if( startIdx < 0 )
/* Generated */        return ENUM_VALUE(RetCode,TA_OUT_OF_RANGE_START_INDEX,OutOfRangeStartIndex);
/* Generated */     if( (endIdx < 0) || (endIdx < startIdx))
/* Generated */        return ENUM_VALUE(RetCode,TA_OUT_OF_RANGE_END_INDEX,OutOfRangeEndIndex);
/* Generated */     #if !defined(_JAVA)
/* Generated */     if(!inOpen||!inHigh||!inLow||!inClose)
/* Generated */        return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #endif 
/* Generated */     #if !defined(_JAVA)
/* Generated */     if( !outInteger )
/* Generated */        return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #endif 
/* Generated */  #endif 
/* Generated */    lookbackTotal = LOOKBACK_CALL(CDL3BLACKCROWS)();
/* Generated */    if( startIdx < lookbackTotal )
/* Generated */       startIdx = lookbackTotal;
/* Generated */    if( startIdx > endIdx )
/* Generated */    {
/* Generated */       VALUE_HANDLE_DEREF_TO_ZERO(outBegIdx);
/* Generated */       VALUE_HANDLE_DEREF_TO_ZERO(outNBElement);
/* Generated */       return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
/* Generated */    }
/* Generated */    ShadowVeryShortPeriodTotal[2] = 0;
/* Generated */    ShadowVeryShortPeriodTotal[1] = 0;
/* Generated */    ShadowVeryShortPeriodTotal[0] = 0;
/* Generated */    ShadowVeryShortTrailingIdx = startIdx - TA_CANDLEAVGPERIOD(ShadowVeryShort);
/* Generated */    i = ShadowVeryShortTrailingIdx;
/* Generated */    while( i < startIdx ) {
/* Generated */         ShadowVeryShortPeriodTotal[2] += TA_CANDLERANGE( ShadowVeryShort, i-2 );
/* Generated */         ShadowVeryShortPeriodTotal[1] += TA_CANDLERANGE( ShadowVeryShort, i-1 );
/* Generated */         ShadowVeryShortPeriodTotal[0] += TA_CANDLERANGE( ShadowVeryShort, i );
/* Generated */         i++;
/* Generated */    }
/* Generated */    i = startIdx;
/* Generated */    outIdx = 0;
/* Generated */    do
/* Generated */    {
/* Generated */         if( TA_CANDLECOLOR(i-3) == 1 &&                                         // white
/* Generated */             TA_CANDLECOLOR(i-2) == -1 &&                                        // 1st black
/* Generated */             TA_LOWERSHADOW(i-2) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[2], i-2 ) &&     
/* Generated */                                                                                 // very short lower shadow
/* Generated */             TA_CANDLECOLOR(i-1) == -1 &&                                        // 2nd black
/* Generated */             TA_LOWERSHADOW(i-1) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[1], i-1 ) &&     
/* Generated */                                                                                 // very short lower shadow
/* Generated */             TA_CANDLECOLOR(i) == -1 &&                                          // 3rd black
/* Generated */             TA_LOWERSHADOW(i) < TA_CANDLEAVERAGE( ShadowVeryShort, ShadowVeryShortPeriodTotal[0], i ) &&         
/* Generated */                                                                                 // very short lower shadow
/* Generated */             inOpen[i-1] < inOpen[i-2] && inOpen[i-1] > inClose[i-2] &&          // 2nd black opens within 1st black's rb
/* Generated */             inOpen[i] < inOpen[i-1] && inOpen[i] > inClose[i-1] &&              // 3rd black opens within 2nd black's rb
/* Generated */             inHigh[i-3] > inClose[i-2] &&                                       // 1st black closes under prior candle's high
/* Generated */             inClose[i-2] > inClose[i-1] &&                                      // three declining
/* Generated */             inClose[i-1] > inClose[i]                                           // three declining
/* Generated */           )
/* Generated */             outInteger[outIdx++] = -100;
/* Generated */         else
/* Generated */             outInteger[outIdx++] = 0;
/* Generated */         for (totIdx = 2; totIdx >= 0; --totIdx)
/* Generated */             ShadowVeryShortPeriodTotal[totIdx] += TA_CANDLERANGE( ShadowVeryShort, i-totIdx ) 
/* Generated */                                                 - TA_CANDLERANGE( ShadowVeryShort, ShadowVeryShortTrailingIdx-totIdx );
/* Generated */         i++; 
/* Generated */         ShadowVeryShortTrailingIdx++;
/* Generated */    } while( i <= endIdx );
/* Generated */    VALUE_HANDLE_DEREF(outNBElement) = outIdx;
/* Generated */    VALUE_HANDLE_DEREF(outBegIdx)    = startIdx;
/* Generated */    return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
/* Generated */ }
/* Generated */ 
/* Generated */ #if defined( _MANAGED )
/* Generated */ }}} // Close namespace TicTacTec.TA.Lib
/* Generated */ #endif
/**** END GENCODE SECTION 5 - DO NOT DELETE THIS LINE ****/