feat: TA-Lib candlestick patterns — tasuki-gap/unique-three-river/marubozu-pair/concealing-baby-swallow (part 9 of 9) (#141) · 124efb4432 - wickra

feat: TA-Lib candlestick patterns — tasuki-gap/unique-three-river/marubozu-pair/concealing-baby-swallow (part 9 of 9) (#141)

The final batch of the TA-Lib candlestick roadmap. Adds five 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.

- **Tasuki Gap** (`CDLTASUKIGAP`) — a 3-bar continuation: two same-coloured candles gap in the trend direction, then an opposite candle opens within the second body and closes back into the gap without filling it; upside +1, downside -1.
- **Unique Three River** (`CDLUNIQUE3RIVER`) — a 3-bar bullish reversal: a long black candle, a black candle probing a new low with its body inside the first, then a small white candle held below it; bullish +1.
- **Closing Marubozu** (`CDLCLOSINGMARUBOZU`) — a single long-bodied candle with no shadow on the close end; +1 (white, closes at the high) or -1 (black, closes at the low).
- **Opening Marubozu** — a single long-bodied candle with no shadow on the open end; +1 (white, opens at the low) or -1 (black, opens at the high). No direct TA-Lib equivalent — completes the pair with the closing marubozu.
- **Concealing Baby Swallow** (`CDLCONCEALBABYSWALL`) — a rare 4-bar bullish capitulation: two black marubozu, a black candle gapping down with an upper shadow into the second, then a large black candle engulfing it entirely; bullish +1.

Body and shadow thresholds follow the geometric house style (fixed fractions of the bar range) rather than TA-Lib's rolling averages.

Counter 284 → 289 (mod-count == lib counted block; FAMILIES total 279 → 284).

Stacked on #140 (`feat/cdl-gap-methods`); base retargets to `main` as the stack merges down.

This commit is contained in:

kingchenc

2026-06-02 17:27:39 +02:00

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GitHub

parent 4d0bc08efd

commit 124efb4432

19 changed files with 1385 additions and 40 deletions

									
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				@@ -8,7 +8,7 @@ That includes:

				  [Python](https://docs.wickra.org/Quickstart-Python),

				  [Node](https://docs.wickra.org/Quickstart-Node), and

				  [WASM](https://docs.wickra.org/Quickstart-WASM).

				- A per-indicator deep dive for every one of the **284 indicators** across

				- A per-indicator deep dive for every one of the **289 indicators** across

				  the sixteen families (Moving Averages, Momentum Oscillators, Trend &

				  Directional, Price Oscillators, Volatility & Bands, Bands & Channels,

				  Trailing Stops, Volume, Price Statistics, Ehlers / Cycle DSP, Pivots &