Wickra — streaming-first technical indicators

[![CI](https://raw.githubusercontent.com/wickra-lib/.github/main/profile/badges/ci.svg)](https://github.com/wickra-lib/wickra/actions/workflows/ci.yml) [![codecov](https://raw.githubusercontent.com/wickra-lib/.github/main/profile/badges/codecov.svg)](https://codecov.io/gh/wickra-lib/wickra) [![GitHub release](https://raw.githubusercontent.com/wickra-lib/.github/main/profile/badges/release.svg)](https://github.com/wickra-lib/wickra/releases/latest) [![License: MIT OR Apache-2.0](https://raw.githubusercontent.com/wickra-lib/.github/main/profile/badges/license.svg)](https://github.com/wickra-lib/wickra#license) # Wickra — C / C++ --- > **▶ Live demo:** all 514 indicators over real Binance market data, computed live in your browser — **[live.wickra.org](https://live.wickra.org)** · zero backend, powered by `wickra-wasm`. **Streaming-first technical indicators for C and C++. A prebuilt shared/static library plus a generated `wickra.h` — no system dependencies.** Wickra is a multi-language technical-analysis library with a Rust core and bindings for Python, Node.js and WASM, plus a C ABI for C, C++, C#, Go, Java, R and any other C-capable language. Every indicator is an O(1) streaming state machine, so live trading bots and historical backtests share the exact same implementation. This package is the **C ABI hub**: it compiles the core to a C-compatible shared/static library plus a generated header, so any C-capable language (C, C++, C#, Go, Java, R) links against one artifact instead of re-wrapping every indicator natively. ## Install Grab the prebuilt header + library for your platform from the [GitHub releases](https://github.com/wickra-lib/wickra/releases) — each archive has `wickra.h`, the optional `wickra.hpp` C++ wrapper, and the shared/static library — or build from source: ```bash cargo build -p wickra-c --release # -> target/release/libwickra.{so,dylib} or wickra.dll (+ import lib) + a staticlib ``` Then compile against the header and link the library (`cc app.c -I include -L lib -lwickra -lm -o app`). ## Quick start ```c #include "wickra.h" struct Rsi *rsi = wickra_rsi_new(14); /* NULL on invalid params */ for (size_t i = 0; i < n; ++i) { double v = wickra_rsi_update(rsi, prices[i]); /* NaN during warmup */ if (v == v && v > 70.0) /* v == v is the NaN check */ printf("overbought\n"); } wickra_rsi_free(rsi); /* exactly once per _new */ ``` Every indicator is an opaque handle with the same five functions — `_new` / `_update` / `_batch` / `_reset` / `_free`. `update` is O(1); there is no RAII across the C boundary, so each `_new` needs exactly one `_free`, and every function is NULL-safe (a NULL handle yields `NaN` or a no-op, never a crash). Multi-output indicators (MACD, Bollinger, ADX, …) take a pointer to a `#[repr(C)]` struct and return a `bool`. The optional `wickra.hpp` wraps any handle in a move-only `wickra::Handle` for exception-safe C++ lifetimes. ## Benchmark `benchmarks/throughput.c` reports streaming and batch updates-per-second for `SMA`, `ATR` and `MACD`. As the thinnest binding it is the floor of the per-binding FFI overhead — not a cross-library ratio (the same Rust core runs under every binding); see the repository [BENCHMARKS.md](https://github.com/wickra-lib/wickra/blob/main/BENCHMARKS.md) §3. ```bash cargo build -p wickra-c --release cmake -S benchmarks -B build && cmake --build build ./build/throughput ``` ## Documentation The full indicator catalogue, guides, quickstarts, and API reference live in the main repository and documentation site: - **Repository & full indicator list:** - **Docs** (C quickstart, cookbook, TA-Lib migration): - **Runnable examples:** [`examples/c/`](https://github.com/wickra-lib/wickra/tree/main/examples/c) Wickra ships native bindings for Python, Node.js, WASM and Rust, plus this C ABI hub that any C-capable language (C, C++, C#, Go, Java, R) links against — all exposing the same indicators from the shared Rust core. ## Security Found a security issue? **Please don't open a public issue.** Report it privately via the affected repository's *Security* tab (*"Report a vulnerability"*) or email **support@wickra.org** with a subject line starting `[wickra security]`. Full policy: . ## Disclaimer Wickra is an indicator toolkit, not a trading system. The values it computes are deterministic transforms of the input data — they are not financial advice and do not predict the market. Any use in a live trading context is at your own risk. The library is provided **as is**, without warranty of any kind. ## License Licensed under either of [Apache-2.0](https://github.com/wickra-lib/wickra/blob/main/LICENSE-APACHE) or [MIT](https://github.com/wickra-lib/wickra/blob/main/LICENSE-MIT) at your option.