feat(family-14): add 15 candlestick patterns (#53)
* feat(family-14): add 15 candlestick patterns
Introduces the Candlestick Patterns family (block A of the family-14 spec)
as scalar f64 indicators on Candle inputs. Each detector emits +1.0 for a
bullish reading, -1.0 for a bearish reading, and 0.0 when no pattern is
present. Doji is direction-less and emits +1.0 / 0.0 only.
New indicators (15):
- Doji
- Hammer
- InvertedHammer
- HangingMan
- ShootingStar
- Engulfing
- Harami
- MorningEveningStar (signed: +1.0 morning star, -1.0 evening star)
- ThreeSoldiersOrCrows (signed: +1.0 soldiers, -1.0 crows)
- PiercingDarkCloud (signed: +1.0 piercing, -1.0 dark cloud)
- Marubozu (signed: +1.0 bullish, -1.0 bearish, 5 percent shadow tolerance default)
- Tweezer (signed: +1.0 bottom, -1.0 top, 10 bps relative tolerance default)
- SpinningTop (direction-signed indecision)
- ThreeInside (confirmed Harami)
- ThreeOutside (confirmed Engulfing)
MVP scope notes:
- Pattern-shape check only, no trend filter applied. Caller combines with a
trend indicator for actionable signals. Documented in every doc comment.
- Block B (Harmonic patterns) and block C (Chart patterns) remain
out-of-scope and will follow when the pattern-detection framework (pivot
detector, multi-bar state machines) lands.
Touched across all bindings: Python, Node, WASM. Fuzz target, Python tests
(streaming-vs-batch + reference values), Node tests (streaming-vs-batch +
reference values), and a representative bench subset (1-, 2- and 3-bar
patterns) added. README family table + indicator counter (71 -> 86, eight
-> nine families) and CHANGELOG [Unreleased] updated.
* fix(family-14): unpack MULTI values with *_ to handle 3-element tuples
* cov(family-14): cover Default impl cold paths and MorningEveningStar guard branches
kingchenc
55284a3042