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kingchenc 13bc801f89 feat(indicators): B3 Trend & Directional batch (413 -> 420) (#181 )

Adds the **B3 — Trend & Directional** batch: seven new indicators, taking the
catalog from 413 to 420 (Trend & Directional family).

| Indicator | Input → Output | Summary |
|-----------|----------------|---------|
| `Qstick` | candle → f64 | Chande's SMA of the candle body (close − open) |
| `TtmTrend` | candle → f64 (±1) | John Carter close-vs-median-SMA trend filter |
| `TrendStrengthIndex` | f64 → f64 | signed r² of an OLS regression of price vs time |
| `PolarizedFractalEfficiency` | f64 → f64 | Hannula directional trend efficiency |
| `WavePm` | f64 → f64 | Kase variance-normalised peak-momentum statistic (reconstruction) |
| `GatorOscillator` | candle → struct | Bill Williams Alligator convergence/divergence histogram |
| `KasePermissionStochastic` | candle → struct | double-smoothed stochastic permission filter |

Note: the roadmap's "Directional Indicator +DI/−DI" item is already covered by
the existing standalone `PlusDi` / `MinusDi` / `Dx`, so it is intentionally not
re-added.

All touchpoints wired: core (every-branch unit tests), Python/Node/WASM
bindings, fuzz drivers, Python test registries + reference tests, Node
factories, README/CHANGELOG counters.

Local verify: `cargo test -p wickra-core` (lib 3389 + doc 378), `cargo clippy
--workspace --all-targets --all-features -- -D warnings`, node build + 495
tests, maturin + 815 pytest, counter 420 == 420.

2026-06-04 17:57:24 +02:00

README.md

feat(indicators): B3 Trend & Directional batch (413 -> 420) (#181 )

2026-06-04 17:57:24 +02:00

README.md

Documentation

Wickra's full documentation lives at docs.wickra.org.

That includes:

Quickstarts for Rust, Python, Node, and WASM.
A per-indicator deep dive for every one of the 420 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 & S/R, DeMark, Ichimoku & Charts, Candlestick Patterns, Market Profile, Risk / Performance) — see the indicators overview.
Reference pages: warmup periods, streaming vs batch, indicator chaining, and the data layer.
Guides: Cookbook, TA-Lib migration, FAQ.

Editing the docs

The documentation site is a separate git repository at https://github.com/wickra-lib/wickra-docs. Open a pull request there to propose changes; the site is built with VitePress and deploys to docs.wickra.org.