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Coinray Strategy SDK

Write indicators and trading strategies in TypeScript. The same script draws on the chart in your browser, fires alerts on the server, and runs in backtests, with identical results in all three places.

import { src, ta, param, plot, alert, isNewBar } from "@coinray/strategy";

const fast = param.int("Fast EMA", 9, 2, 200);
const slow = param.int("Slow EMA", 21, 2, 400);

export function onBar(): void {
  const f = ta.ema(src.close, fast);
  const s = ta.ema(src.close, slow);
  plot("fast", f);
  plot("slow", s);

  if (isNewBar() && f[1] > s[1] && f[2] <= s[2]) {
    alert("golden_cross", "{{ticker}} fast EMA crossed above slow at {{close}}");
  }
}

What you can build​

  • Indicators: plots in the price pane or in their own panes, with declared colors, styles, fills and horizontal levels.
  • Drawings: markers, lines, boxes, labels, polylines and circles, with Pine style options such as extend, arrow heads and label callouts.
  • Alerts: named alerts with {{placeholder}} messages, delivered to the app, webhooks and Altrady signal bots.
  • Strategies: order groups with multiple entries, take-profit legs, a stop loss and a trailing stop, backtested with TradingView-style statistics.
  • Multi-timeframe logic: higher-timeframe series built from the chart's own bars.
  • Crypto data Pine does not have: aggressive buy and sell volume, CVD, funding rate and open interest.

How it runs​

Scripts are written in TypeScript against the @coinray/strategy SDK and compiled to WebAssembly. The compiled module runs in a sandbox with a fixed compute, memory and event budget per bar (see Limits), so a script cannot slow down the chart or the scanner.

The language is AssemblyScript, a strict subset of TypeScript with explicit number types (i32, i64, f64). Most TypeScript you would write for a trading script works unchanged. The differences that matter are listed in Getting started.

Where to go next​