kingchenc
b4613a74c8
Candle batch() methods that index parallel high/low/close/volume arrays without first checking their lengths panic on a length mismatch. Adds an equal-length guard returning a clean error to the 11 affected Node methods (Stochastic, ADX, CCI, WilliamsR, MFI, PSAR, Keltner, Donchian, VWAP, AO, Aroon), the 10 affected WASM methods, and the 8 affected Python methods (WilliamsR, ADX, MFI, PSAR, Keltner, VWAP, AO, Aroon) -- matching the guard ATR/OBV already had. Verified in Node: mismatched arrays now throw instead of crashing.
wickra-wasm
WebAssembly bindings for the Wickra streaming-first technical indicators library.
Build
You need wasm-pack and the
wasm32-unknown-unknown Rust target:
rustup target add wasm32-unknown-unknown
cargo install wasm-pack
Then from the repository root:
wasm-pack build bindings/wasm --target web --release --features panic-hook
The compiled package lands in bindings/wasm/pkg/. Targets:
--target webfor native ES modules in browsers--target bundlerfor webpack/Vite/Rollup--target nodejsfor Node.js
Example
import init, { SMA, RSI, MACD, version } from "./pkg/wickra_wasm.js";
await init();
console.log("wickra:", version());
// Streaming
const rsi = new RSI(14);
for (const price of livePrices) {
const v = rsi.update(price);
if (v !== undefined && v > 70) console.log("overbought");
}
// Batch (returns a Float64Array; NaN for warmup positions)
const sma = new SMA(20).batch(new Float64Array(historicalPrices));
An interactive demo lives in bindings/wasm/examples/index.html. After building
the package serve the bindings/wasm/ directory and open examples/index.html.