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feat: TA-Lib candlestick patterns — gap-three-methods/stalled/stick-sandwich/takuri (part 8 of 9) (#140)

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Adds five TA-Lib candlestick patterns, each a streaming `Indicator<Input = Candle, Output = f64>` emitting the family's uniform `±1.0 / 0.0` sign convention, fully wired across the Rust core, Python / Node / WASM bindings, fuzz target and reference tests.

- **Upside Gap Three Methods** (`CDLXSIDEGAP3METHODS`) — a 3-bar bullish continuation: two white candles gap up, then a black candle opens within the second body and closes within the first; bullish +1.
- **Downside Gap Three Methods** (`CDLXSIDEGAP3METHODS`) — the bearish mirror: two black candles gap down, then a white candle opens within the second body and closes within the first; bearish -1.
- **Stalled Pattern** (`CDLSTALLEDPATTERN`) — a 3-bar bearish reversal warning: two long white candles then a small white candle riding the shoulder, signalling the rally is stalling; bearish -1.
- **Stick Sandwich** (`CDLSTICKSANDWICH`) — a 3-bar bullish reversal: two black candles closing at the same level sandwich a white candle, marking a support floor; bullish +1.
- **Takuri** (`CDLTAKURI`) — a single-bar bullish reversal, a strict Dragonfly Doji with a negligible upper shadow and very long lower shadow; bullish +1.

Body and shadow thresholds follow the geometric house style (fixed fractions of the bar range) rather than TA-Lib's rolling averages. Upside / Downside Gap Three Methods share the `CDLXSIDEGAP3METHODS` code, so the second carries a manual CHANGELOG entry (as with Rising / Falling Three Methods).

Counter 279 → 284 (mod-count == lib counted block; FAMILIES total 274 → 279).

Stacked on #139 (`feat/cdl-lines`); base retargets to `main` once the predecessor merges.
This commit is contained in:
kingchenc
2026-06-02 17:24:42 +02:00
committed by GitHub
parent c2c85c7ecf
commit 4d0bc08efd
19 changed files with 1262 additions and 36 deletions
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fuzz/fuzz_targets/indicator_update_candle.rs
+6 -1
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@@ -23,7 +23,7 @@
use libfuzzer_sys::fuzz_target;
use wickra_core::{
AbandonedBaby, AccelerationBands, AcceleratorOscillator, AdOscillator, Adl, AdvanceBlock, Adx, Adxr, Alligator, AnchoredVwap, Aroon, AroonOscillator, Atr, AtrBands, AtrTrailingStop, AwesomeOscillator, AwesomeOscillatorHistogram, BalanceOfPower, BatchExt, BeltHold, Breakaway, Camarilla, Candle, Cci, ChaikinMoneyFlow, ChaikinOscillator, ChaikinVolatility, ChandeKrollStop, ChandelierExit, ChoppinessIndex, ClassicPivots, Counterattack, DemandIndex, DemarkPivots, Doji, DojiStar, Donchian, DonchianStop, DragonflyDoji, EaseOfMovement, Engulfing, EveningDojiStar, Evwma, FallingThreeMethods, FibonacciPivots, ForceIndex, FractalChaosBands, GapSideBySideWhite, GarmanKlassVolatility, GravestoneDoji, Hammer, HangingMan, Harami, HeikinAshi, HiLoActivator, HighWave, Hikkake, HikkakeModified, HomingPigeon, HurstChannel, Ichimoku, IdenticalThreeCrows, InNeck, Indicator, Inertia, InitialBalance, InvertedHammer, Keltner, Kicking, KickingByLength, Kvo, LadderBottom, LongLeggedDoji, LongLine, MarketFacilitationIndex, Marubozu, MassIndex, MatHold, MatchingLow, MedianPrice, Mfi, MorningDojiStar, MorningEveningStar, Natr, Nvi, Obv, OnNeck, OpeningRange, ParkinsonVolatility, Pgo, PiercingDarkCloud, Psar, Pvi, RickshawMan, RisingThreeMethods, RogersSatchellVolatility, RollingVwap, Rvi, Rwi, SeparatingLines, ShootingStar, ShortLine, Smi, SpinningTop, StarcBands, Stochastic, SuperTrend, TdCombo, TdCountdown, TdDeMarker, TdDifferential, TdLines, TdOpen, TdPressure, TdRangeProjection, TdRei, TdRiskLevel, TdSequential, TdSetup, ThreeInside, ThreeLineStrike, ThreeOutside, ThreeSoldiersOrCrows, ThreeStarsInSouth, Thrusting, TrueRange, Tsv, TtmSqueeze, Tweezer, TwoCrows, TypicalPrice, UltimateOscillator, UpsideGapTwoCrows, ValueArea, VoltyStop, VolumeOscillator, VolumePriceTrend, Vortex, Vwap, VwapStdDevBands, Vwma, Vzo, WaveTrend, WeightedClose, WilliamsFractals, WilliamsR, WoodiePivots, YangZhangVolatility, YoyoExit, ZigZag
AbandonedBaby, AccelerationBands, AcceleratorOscillator, AdOscillator, Adl, AdvanceBlock, Adx, Adxr, Alligator, AnchoredVwap, Aroon, AroonOscillator, Atr, AtrBands, AtrTrailingStop, AwesomeOscillator, AwesomeOscillatorHistogram, BalanceOfPower, BatchExt, BeltHold, Breakaway, Camarilla, Candle, Cci, ChaikinMoneyFlow, ChaikinOscillator, ChaikinVolatility, ChandeKrollStop, ChandelierExit, ChoppinessIndex, ClassicPivots, Counterattack, DemandIndex, DemarkPivots, Doji, DojiStar, Donchian, DonchianStop, DownsideGapThreeMethods, DragonflyDoji, EaseOfMovement, Engulfing, EveningDojiStar, Evwma, FallingThreeMethods, FibonacciPivots, ForceIndex, FractalChaosBands, GapSideBySideWhite, GarmanKlassVolatility, GravestoneDoji, Hammer, HangingMan, Harami, HeikinAshi, HiLoActivator, HighWave, Hikkake, HikkakeModified, HomingPigeon, HurstChannel, Ichimoku, IdenticalThreeCrows, InNeck, Indicator, Inertia, InitialBalance, InvertedHammer, Keltner, Kicking, KickingByLength, Kvo, LadderBottom, LongLeggedDoji, LongLine, MarketFacilitationIndex, Marubozu, MassIndex, MatHold, MatchingLow, MedianPrice, Mfi, MorningDojiStar, MorningEveningStar, Natr, Nvi, Obv, OnNeck, OpeningRange, ParkinsonVolatility, Pgo, PiercingDarkCloud, Psar, Pvi, RickshawMan, RisingThreeMethods, RogersSatchellVolatility, RollingVwap, Rvi, Rwi, SeparatingLines, ShootingStar, ShortLine, Smi, SpinningTop, StalledPattern, StarcBands, StickSandwich, Stochastic, SuperTrend, Takuri, TdCombo, TdCountdown, TdDeMarker, TdDifferential, TdLines, TdOpen, TdPressure, TdRangeProjection, TdRei, TdRiskLevel, TdSequential, TdSetup, ThreeInside, ThreeLineStrike, ThreeOutside, ThreeSoldiersOrCrows, ThreeStarsInSouth, Thrusting, TrueRange, Tsv, TtmSqueeze, Tweezer, TwoCrows, TypicalPrice, UltimateOscillator, UpsideGapThreeMethods, UpsideGapTwoCrows, ValueArea, VoltyStop, VolumeOscillator, VolumePriceTrend, Vortex, Vwap, VwapStdDevBands, Vwma, Vzo, WaveTrend, WeightedClose, WilliamsFractals, WilliamsR, WoodiePivots, YangZhangVolatility, YoyoExit, ZigZag
};
/// Convert a flat `f64` stream into a `Vec<Candle>` by chunking it into
@@ -278,6 +278,11 @@ fuzz_target!(|data: Vec<f64>| {
}
// --- Candlestick Patterns (family 14) ---
drive(Takuri::new, &candles);
drive(StickSandwich::new, &candles);
drive(StalledPattern::new, &candles);
drive(DownsideGapThreeMethods::new, &candles);
drive(UpsideGapThreeMethods::new, &candles);
drive(FallingThreeMethods::new, &candles);
drive(RisingThreeMethods::new, &candles);
drive(ShortLine::new, &candles);