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wickra/docs/README.md
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kingchenc bca61322b5 feat: add 9 Risk / Performance indicators (B18) (#218)
Adds nine risk/performance metrics to the existing **Risk / Performance** family, all consuming a per-period return series (`f64` in, `f64` out). Indicator count **498 → 507**.

## Indicators

Single-param (`new(period)`, macro bindings):
- **SterlingRatio** — mean return over average drawdown of the equity curve.
- **BurkeRatio** — return over root-sum-squared drawdowns.
- **MartinRatio** — Ulcer Performance Index; return over RMS percentage drawdown.
- **TailRatio** — 95th percentile over the absolute 5th percentile return.
- **KRatio** — Kestner; equity-curve OLS slope over the standard error of that slope.
- **CommonSenseRatio** — tail ratio times gain-to-pain.
- **GainToPainRatio** — sum of returns over the sum of absolute losses.

Multi-param (hand-written Python/Node bindings, variadic WASM macro):
- **UpsidePotentialRatio** — `new(period, mar)`; upside mean over downside deviation (Sortino philosophy).
- **M2Measure** — `new(period, risk_free, benchmark_stddev)`; Modigliani M², Sharpe rescaled into benchmark return units.

## Touchpoints
Core modules + unit tests, `mod.rs`/`lib.rs` wiring, Python/Node/WASM bindings (`index.d.ts`/`index.js` regenerated), fuzz drive lines, Python `SCALAR` registry + Node factories, CHANGELOG, and the indicator counters.

## Verification
- `cargo test -p wickra-core --lib` — 4149 passed
- `cargo test -p wickra-core --doc` — 457 passed
- `cargo clippy --workspace --all-targets --all-features -- -D warnings` — clean
- `npm test` (node) — 577 passed
- `pytest` (python) — 947 passed
2026-06-08 13:23:01 +02:00

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# Documentation
Wickra's full documentation lives at **[docs.wickra.org](https://docs.wickra.org)**.
That includes:
- **Quickstarts** for [Rust](https://docs.wickra.org/Quickstart-Rust),
[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 **507 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](https://docs.wickra.org/Indicators-Overview).
- **Reference pages**: [warmup periods](https://docs.wickra.org/Warmup-Periods),
[streaming vs batch](https://docs.wickra.org/Streaming-vs-Batch),
[indicator chaining](https://docs.wickra.org/Indicator-Chaining), and the
[data layer](https://docs.wickra.org/Data-Layer).
- **Guides**: [Cookbook](https://docs.wickra.org/Cookbook),
[TA-Lib migration](https://docs.wickra.org/TA-Lib-Migration),
[FAQ](https://docs.wickra.org/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`.