About Wickra Screener

Wickra Screener scans thousands of symbols in parallel against a single condition tree over the 514 streaming indicators of the Wickra core. A screen is a JSON document — data, not code — so the exact same scan runs in every one of ten languages and returns byte-for-byte identical results.

What makes it different

• The screen is data. A serde ScanSpec — a universe, a condition tree of indicator / price / constant expressions combined with all / any / not, and an optional rank and limit. Because it is data, it crosses the C ABI and WASM unchanged.
• 514 indicators. Any condition can reference any Wickra indicator (Rsi, Ema, Macd, BollingerBands, …), evaluated at the latest bar.
• Parallel and deterministic. The universe is folded in parallel with rayon, or sequentially on the WASM path — both produce a byte-identical ranked report, pinned by a golden corpus in CI.
• Cross-section & breadth. Rank, percentile and z-score a symbol across the whole universe, or gate matches on a market-wide predicate — things a per-symbol loop cannot express.

Why it exists

Screeners are usually one language, one hard-coded rule set. Wickra Screener defines the scan surface once, in Rust, and exposes it as a JSON-over-C-ABI data API to Rust, Python, Node.js, WASM and — over a C ABI — C, C++, C#, Go, Java and R. The screen itself is portable JSON, so the same rule set runs anywhere.

Open source

Released under the MIT OR Apache-2.0 license — permissive, OSI-approved, free for any use including commercial. Source, issues and releases on GitHub.

Disclaimer

Wickra Screener is a software library, not a trading system, and is provided as-is with no warranty. It surfaces conditions over market data; it does not give financial advice. Use it at your own risk.