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feat: TA-Lib candlestick patterns — crows & three-line (part 1 of 9) (#130)

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* feat: add Two Crows candlestick pattern (CDL2CROWS)

* feat: add Upside Gap Two Crows candlestick pattern (CDLUPSIDEGAP2CROWS)

* feat: add Identical Three Crows candlestick pattern (CDLIDENTICAL3CROWS)

* feat: add Three Line Strike candlestick pattern (CDL3LINESTRIKE)

* feat: add Three Stars in the South candlestick pattern (CDL3STARSINSOUTH)
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kingchenc
2026-06-01 23:20:10 +02:00
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CHANGELOG.md
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@@ -8,6 +8,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
### Added
- **TA-Lib candlestick patterns (part 1).** New candlestick pattern detectors
matching TA-Lib `CDL*`, emitting the family's signed `+1 / 0 / −1` convention
over OHLCV candles in Rust, Python, Node and WASM:
- **Two Crows** — a three-bar bearish reversal (`CDL2CROWS`): a long white
candle, a black candle whose body gaps up, then a black candle that opens
inside the second's body and closes inside the first's.
- **Upside Gap Two Crows** — a three-bar bearish reversal
(`CDLUPSIDEGAP2CROWS`): two black candles gap up over a long white candle,
the second engulfing the first crow yet still closing above the white body,
leaving the upside gap open.
- **Identical Three Crows** — a three-bar bearish reversal
(`CDLIDENTICAL3CROWS`): three red candles with steadily lower closes, each
opening at the prior candle's close so the bodies stack in an identical
staircase.
- **Three Line Strike** — a four-bar pattern (`CDL3LINESTRIKE`): a
three-candle advance or decline struck by a fourth opposite-colour candle
that engulfs the entire run; bullish `+1`, bearish `−1`.
- **Three Stars in the South** — a rare three-bar bullish reversal
(`CDL3STARSINSOUTH`): three shrinking red candles each carving a higher low
and contracting toward a tiny black marubozu as selling exhausts.
- **Derivatives family — funding & open interest (part 1).** A new family of
indicators that consume a perpetual / futures tick (`DerivativesTick`,
bundling funding rate, mark / index / futures price, open interest,