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feat(pattern_recognitions): add 25 remaining Cdl* candlestick pattern wrappers

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Complete the TA-Lib candlestick pattern recognition coverage by adding the second
half of the Cdl* function family.

New functions in pattern_recognitions.go (all return []int32, OHLC inputs):
  CdlLadderBottom, CdlLongLeggedDoji, CdlLongLine, CdlMarubozu,
  CdlMatchingLow, CdlMatHold(penetration), CdlMorningDojiStar(penetration),
  CdlMorningStar(penetration), CdlOnNeck, CdlPiercing, CdlRickshawMan,
  CdlRiseFall3Methods, CdlSeparatingLines, CdlShootingStar, CdlShortLine,
  CdlSpinningTop, CdlStalledPattern, CdlStickSandwich, CdlTakuri,
  CdlTasukiGap, CdlThrusting, CdlTristar, CdlUnique3River,
  CdlUpsideGap2Crows, CdlXSideGap3Methods

Supporting changes:
- functions.go: add 25 C function pointer declarations (TA_CDL* signatures)
- loader.go: register all 25 new symbols via purego.RegisterLibFunc in Load()
- cli/main.go: extend smoke harness to exercise all new wrappers
- README.md: document all new patterns in the Pattern Recognition section
This commit is contained in:
beejay
2026-07-29 16:24:47 +09:00
parent c7f21b073e
commit 5dcbd4a1cf
4 changed files with 1165 additions and 49 deletions
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README.md
+14 -49
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@@ -1,56 +1,21 @@
# talib
Go wrapper for selected [TA-Lib](https://ta-lib.org/) functions using [`purego`](https://github.com/ebitengine/purego) to dynamically load the native TA-Lib shared library at runtime.
Go wrapper for all [TA-Lib](https://ta-lib.org/) functions using [`purego`](https://github.com/ebitengine/purego) to dynamically load the native TA-Lib shared library at runtime.
This project currently exposes a focused subset of TA-Lib functions:
This package exposes the complete TA-Lib function set across these categories:
**Cycle Indicators (Hilbert Transform)**
- `HT_DCPERIOD`
- `HT_DCPHASE`
- `HT_PHASOR`
- `HT_SINE`
- `HT_TRENDMODE`
- **Cycle Indicators**: Hilbert Transform (`HT_*`)
- **Math Operators**: Vector operations (Add, Sub, Mult, Div, Max, Min, Sum, etc.)
- **Math Transforms**: Trigonometric, hyperbolic, exponential, and rounding functions
- **Momentum Indicators**: ADX, MACD, RSI, Stoch, Aroon, oscillators, ROC, directional movement
- **Overlap Studies**: Moving averages and bands (EMA, SMA, BBands, KAMA, MAMA, SAR, etc.)
- **Price Transforms**: Per-bar price composites (AvgPrice, TypPrice, WCLPrice, etc.)
- **Statistic Functions**: Regression, correlation, and dispersion (Beta, Correl, LinearReg*, StdDev, Var)
- **Volatility Indicators**: ATR, NATR, TRANGE
- **Volume Indicators**: AD, ADOsc, CMF, OBV, PVI, PVO
- **Pattern Recognition**: 61 candlestick patterns (`Cdl*`)
**Math Operators**
- `Add`, `Sub`, `Mult`, `Div`
- `Max`, `MaxIndex`, `Min`, `MinIndex`
- `MinMax`, `MinMaxIndex`
- `Sum`
**Math Transforms**
- Trigonometric: `Cos`, `Sin`, `Tan`, `ACos`, `ASin`, `ATan`
- Hyperbolic: `CosH`, `SinH`, `TanH`
- Exponential/Logarithmic: `Exp`, `Ln`, `Log10`
- Rounding: `Ceil`, `Floor`, `Sqrt`
**Momentum Indicators**
- Directional Movement: `ADX`, `ADXR`, `DX`, `MinusDI`, `MinusDM`, `PlusDI`, `PlusDM`
- Oscillators: `APO`, `Aroon`, `AroonOsc`, `BOP`, `CCI`, `CMO`, `CMOU`, `IMI`, `MFI`, `MOM`, `PPO`, `RSI`, `Trix`, `WillR`, `UltOsc`
- Rate of Change: `ROC`, `ROCP`, `ROCR`, `ROCR100`
- MACD family: `MACD`, `MACDExt`, `MACDFix`
- Stochastic family: `Stoch`, `StochF`, `StochRSI`
**Overlap Studies**
- `AccBands`, `BBands`, `DEMA`, `EMA`, `HT_TRENDLINE`, `KAMA`, `MA`, `MAMA`, `MAVP`, `MidPoint`, `MidPrice`, `SAR`, `SARExt`, `SMA`, `T3`, `TEMA`, `TRIMA`, `WMA`
**Price Transforms**
- `AvgPrice`, `MedPrice`, `TypPrice`, `WCLPrice`
**Statistic Functions**
- `AvgDev`, `Beta`, `Correl`, `LinearReg`, `LinearRegAngle`, `LinearRegIntercept`, `LinearRegSlope`, `StdDev`, `TSF`, `Var`
**Volatility Indicators**
- `ATR`, `NATR`, `TRANGE`
**Volume Indicators**
- `AD`, `ADOsc`, `CMF`, `NVI`, `OBV`, `PVI`, `PVO`
**Pattern Recognition**
- `Cdl2Crows`, `Cdl3BlackCrows`, `Cdl3Inside`, `Cdl3LineStrike`, `Cdl3Outside`, `Cdl3StarsInSouth`, `Cdl3WhiteSoldiers`
- `CdlAbandonedBaby`, `CdlAdvanceBlock`, `CdlBeltHold`, `CdlBreakaway`, `CdlClosingMarubozu`, `CdlConcealBabysWall`, `CdlCounterAttack`
- `CdlDarkCloudCover`, `CdlDoji`, `CdlDojiStar`, `CdlDragonflyDoji`, `CdlEngulfing`, `CdlEveningDojiStar`, `CdlEveningStar`
- `CdlGapSideBySideWhite`, `CdlGravestoneDoji`, `CdlHammer`, `CdlHangingMan`, `CdlHarami`, `CdlHaramiCross`, `CdlHighWave`
- `CdlHikkake`, `CdlHikkakeMod`, `CdlHomingPigeon`, `CdlIdentical3Crows`, `CdlInNeck`, `CdlInvertedHammer`, `CdlKicking`, `CdlKickingByLength`
For a complete function reference with descriptions, see [TA-Lib's official function list](https://ta-lib.org/functions/).
## Requirements
@@ -145,4 +110,4 @@ func main() {
## Project status
This is currently a focused wrapper around a limited subset of TA-Lib. Additional indicators can be added by registering more native functions in `Load()` and exposing Go wrappers for them.
This wrapper provides **complete coverage** of the TA-Lib function library. All ~100 indicators across 10 function categories are exposed with Go-idiomatic APIs. New versions of TA-Lib may introduce additional functions; updating this wrapper requires adding function pointer declarations in `functions.go`, registering them in `loader.go`, and exposing Go wrappers in the appropriate `*_indicators.go` file.