ta-lib 里的蠟燭圖形態(tài)函數(shù)源碼

以CDL2CROWS為例, 看一看c語言的源碼:

有關的源碼文件包括

d:\Documents\Pictures\ta-lib\c\src\ta_func\ta_CDL2CROWS.c

d:\Documents\Pictures\ta-lib\c\src\ta_func\ta_utility.h

d:\Documents\Pictures\ta-lib\c\src\ta_common\ta_global.c

d:\Documents\Pictures\ta-lib\c\src\ta_common\ta_global.h

i = startIdx;

/* Proceed with the calculation for the requested range.

* Must have:

* - first candle: long white candle

* - second candle: black real body

* - gap between the first and the second candle's real bodies

* - third candle: black candle that opens within the second real body and closes within the first real body

* The meaning of "long" is specified with TA_SetCandleSettings

* outInteger is negative (-1 to -100): two crows is always bearish;

* the user should consider that two crows is significant when it appears in an uptrend, while this function

* does not consider the trend

*/

outIdx = 0;

do

{

if( TA_CANDLECOLOR(i-2) == 1 && // 1st: white

TA_REALBODY(i-2) > TA_CANDLEAVERAGE( BodyLong, BodyLongPeriodTotal, i-2 ) && // long

TA_CANDLECOLOR(i-1) == -1 && // 2nd: black

TA_REALBODYGAPUP(i-1,i-2) && // gapping up

TA_CANDLECOLOR(i) == -1 && // 3rd: black

inOpen[i] < inOpen[i-1] && inOpen[i] > inClose[i-1] && // opening within 2nd rb

inClose[i] > inOpen[i-2] && inClose[i] < inClose[i-2] // closing within 1st rb

)

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)

*/

BodyLongPeriodTotal += TA_CANDLERANGE( BodyLong, i-2 ) - TA_CANDLERANGE( BodyLong, BodyLongTrailingIdx );

i++;

BodyLongTrailingIdx++;

} while( i <= endIdx );

TA_RetCode TA_RestoreCandleDefaultSettings( TA_CandleSettingType settingType )

{

const TA_CandleSetting TA_CandleDefaultSettings[] = {

/* real body is long when it's longer than the average of the 10 previous candles' real body */

{ TA_BodyLong, TA_RangeType_RealBody, 10, 1.0 },

/* real body is very long when it's longer than 3 times the average of the 10 previous candles' real body */

{ TA_BodyVeryLong, TA_RangeType_RealBody, 10, 3.0 },

/* real body is short when it's shorter than the average of the 10 previous candles' real bodies */

{ TA_BodyShort, TA_RangeType_RealBody, 10, 1.0 },

/* real body is like doji's body when it's shorter than 10% the average of the 10 previous candles' high-low range */

{ TA_BodyDoji, TA_RangeType_HighLow, 10, 0.1 },

/* shadow is long when it's longer than the real body */

{ TA_ShadowLong, TA_RangeType_RealBody, 0, 1.0 },

/* shadow is very long when it's longer than 2 times the real body */

{ TA_ShadowVeryLong, TA_RangeType_RealBody, 0, 2.0 },

/* shadow is short when it's shorter than half the average of the 10 previous candles' sum of shadows */

{ TA_ShadowShort, TA_RangeType_Shadows, 10, 1.0 },

/* shadow is very short when it's shorter than 10% the average of the 10 previous candles' high-low range */

{ TA_ShadowVeryShort, TA_RangeType_HighLow, 10, 0.1 },

/* when measuring distance between parts of candles or width of gaps */

/* "near" means "<= 20% of the average of the 5 previous candles' high-low range" */

{ TA_Near, TA_RangeType_HighLow, 5, 0.2 },

/* when measuring distance between parts of candles or width of gaps */

/* "far" means ">= 60% of the average of the 5 previous candles' high-low range" */

{ TA_Far, TA_RangeType_HighLow, 5, 0.6 },

/* when measuring distance between parts of candles or width of gaps */

/* "equal" means "<= 5% of the average of the 5 previous candles' high-low range" */

{ TA_Equal, TA_RangeType_HighLow, 5, 0.05 }

};

/* Candlestick macros (used by candlestick functions, where the parameters are always called inClose, inOpen, etc.

* Don't use i++ or func(i) with these macros !

*/

#define TA_REALBODY(IDX) ( std_fabs( inClose[IDX] - inOpen[IDX] ) )

#define TA_UPPERSHADOW(IDX) ( inHigh[IDX] - ( inClose[IDX] >= inOpen[IDX] ? inClose[IDX] : inOpen[IDX] ) )

#define TA_LOWERSHADOW(IDX) ( ( inClose[IDX] >= inOpen[IDX] ? inOpen[IDX] : inClose[IDX] ) - inLow[IDX] )

#define TA_HIGHLOWRANGE(IDX) ( inHigh[IDX] - inLow[IDX] )

#define TA_CANDLECOLOR(IDX) ( inClose[IDX] >= inOpen[IDX] ? 1 : -1 )

#if defined( _MANAGED )

#define TA_CANDLERANGETYPE(SET) (Globals->candleSettings[(int)CandleSettingType::SET]->rangeType)

#define TA_CANDLEAVGPERIOD(SET) (Globals->candleSettings[(int)CandleSettingType::SET]->avgPeriod)

#define TA_CANDLEFACTOR(SET) (Globals->candleSettings[(int)CandleSettingType::SET]->factor)

#elif defined( _JAVA )

#define TA_CANDLERANGETYPE(SET) (this.candleSettings[CandleSettingType.SET.ordinal()].rangeType)

#define TA_CANDLEAVGPERIOD(SET) (this.candleSettings[CandleSettingType.SET.ordinal()].avgPeriod)

#define TA_CANDLEFACTOR(SET) (this.candleSettings[CandleSettingType.SET.ordinal()].factor)

#else

#define TA_CANDLERANGETYPE(SET) (TA_Globals->candleSettings[TA_##SET].rangeType)

#define TA_CANDLEAVGPERIOD(SET) (TA_Globals->candleSettings[TA_##SET].avgPeriod)

#define TA_CANDLEFACTOR(SET) (TA_Globals->candleSettings[TA_##SET].factor)

#endif

#define TA_CANDLERANGE(SET,IDX) \

( TA_CANDLERANGETYPE(SET) == ENUM_VALUE(RangeType,TA_RangeType_RealBody,RealBody) ? TA_REALBODY(IDX) : \

( TA_CANDLERANGETYPE(SET) == ENUM_VALUE(RangeType,TA_RangeType_HighLow,HighLow) ? TA_HIGHLOWRANGE(IDX) : \

( TA_CANDLERANGETYPE(SET) == ENUM_VALUE(RangeType,TA_RangeType_Shadows,Shadows) ? TA_UPPERSHADOW(IDX) + TA_LOWERSHADOW(IDX) : \

0 ) ) )

#define TA_CANDLEAVERAGE(SET,SUM,IDX) \

( TA_CANDLEFACTOR(SET) \

* ( TA_CANDLEAVGPERIOD(SET) != 0.0? SUM / TA_CANDLEAVGPERIOD(SET) : TA_CANDLERANGE(SET,IDX) ) \

/ ( TA_CANDLERANGETYPE(SET) == ENUM_VALUE(RangeType,TA_RangeType_Shadows,Shadows) ? 2.0 : 1.0 ) \

)

#define TA_REALBODYGAPUP(IDX2,IDX1) ( min(inOpen[IDX2],inClose[IDX2]) > max(inOpen[IDX1],inClose[IDX1]) )

#define TA_REALBODYGAPDOWN(IDX2,IDX1) ( max(inOpen[IDX2],inClose[IDX2]) < min(inOpen[IDX1],inClose[IDX1]) )

#define TA_CANDLEGAPUP(IDX2,IDX1) ( inLow[IDX2] > inHigh[IDX1] )

#define TA_CANDLEGAPDOWN(IDX2,IDX1) ( inHigh[IDX2] < inLow[IDX1] )

總結

以上是生活随笔為你收集整理的Java 蜡烛图_ta-lib 里的蜡烛图形态函数源码的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內容還不錯，歡迎將生活随笔推薦給好友。