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feat: TA-Lib candlestick patterns — Doji family (part 3 of 9) (#134)

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* feat: add Doji-family candlestick patterns

Five single-/two-bar Doji patterns, all `Input = Candle`, `Output = f64`:

- Doji Star (CDLDOJISTAR) — a long body followed by a doji gapping away in the
  trend direction; bullish +1 (after a black bar), bearish -1 (after a white bar).
- Dragonfly Doji (CDLDRAGONFLYDOJI) — a doji opening and closing at the high with
  a long lower shadow; bullish +1.
- Gravestone Doji (CDLGRAVESTONEDOJI) — a doji opening and closing at the low with
  a long upper shadow; bearish -1.
- Long-Legged Doji (CDLLONGLEGGEDDOJI) — a doji with long shadows on both sides; a
  non-directional indecision flag, +1 on detection.
- Rickshaw Man (CDLRICKSHAWMAN) — a long-legged doji with the body centred in the
  range; a non-directional indecision flag, +1 on detection.

Counter 254 -> 259 (mod-count == lib counted block; FAMILIES total 249 -> 254).

* chore: sync indicator count to 259

---------

Co-authored-by: wickra-bot <wickra-bot@users.noreply.github.com>
This commit is contained in:
kingchenc
2026-06-02 16:45:08 +02:00
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co-authored by wickra-bot
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CHANGELOG.md
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@@ -37,6 +37,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- **Belt-hold** — a single-bar reversal that opens at one extreme of its range and runs the other way; bullish +1, bearish -1 (`CDLBELTHOLD`).
- **Breakaway** — a 5-bar reversal that gaps with the trend, drifts two more bars, then snaps back into the bar1/bar2 body gap; bullish +1, bearish -1 (`CDLBREAKAWAY`).
- **Counterattack** — a 2-bar reversal where an opposite-coloured second bar closes level with the first (the counterattack line); bullish +1, bearish -1 (`CDLCOUNTERATTACK`).
- **Doji Star** — a long body followed by a doji gapping away in the trend direction; bullish +1, bearish -1 (`CDLDOJISTAR`).
- **Dragonfly Doji** — a doji opening and closing at the high with a long lower shadow, a bullish reversal; +1 (`CDLDRAGONFLYDOJI`).
- **Gravestone Doji** — a doji opening and closing at the low with a long upper shadow, a bearish reversal; -1 (`CDLGRAVESTONEDOJI`).
- **Long-Legged Doji** — a doji with long shadows on both sides, an indecision signal; +1 detection (`CDLLONGLEGGEDDOJI`).
- **Rickshaw Man** — a long-legged doji with the body centred in the range, an indecision signal; +1 detection (`CDLRICKSHAWMAN`).
- **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,