Rust

The #![no_std] crate. Every indicator is a fixed-size, allocation-free state machine you update one tick at a time.

cargo add embed-core

#![no_std]
use embed_core::{Sma, Ema, Rsi, Indicator};

let mut sma = Sma::new(20).expect("valid period");
let mut ema = Ema::new(12).expect("valid period");
let mut rsi = Rsi::new(14).expect("valid period");

for &price in &prices {
    // Each update is O(1) with no allocation; None during warmup.
    let s = sma.update(price);
    let e = ema.update(price);
    let r = rsi.update(price);
    let _ = (s, e, r); // byte-identical to wickra-core
}

Sma, Ema, Rsi, Atr and Roc implement the Indicator trait. Atr takes a Candle (update(candle)); the others take an f64.

More

• crates.io/crates/embed-core - docs.rs
• Source & examples
• Latency & memory