Runtime Environment

dxScript executes with ECMAScript 2024 (ES15) support.

Available JS Features

Standard JavaScript features are fully supported:

// Arrow functions
const double = x => x * 2;

// Destructuring
const {min, max} = Math;

// Template literals
const msg = `Price: ${close}`;

// Array methods
const values = [1, 2, 3].map(x => x * 2);

// Spread operator
const combined = [...arr1, ...arr2];

// Optional chaining
const value = obj?.nested?.prop;

// Nullish coalescing
const fallback = value ?? defaultValue;

Not Available

dxScript runs in a sandboxed environment without access to:

• Timers (setTimeout, setInterval)
• Network (fetch, XMLHttpRequest)
• Module system (import, require, module, exports)
• Node.js APIs (process, Buffer, __dirname, __filename)
• Browser globals (window, self, document)

Example

// INIT
const threshold = 0.5;
const labels = ["Low", "Medium", "High"];

function classify(value) {
    if (value < threshold) return labels[0];
    if (value < threshold * 2) return labels[1];
    return labels[2];
}

// TICK
function onTick() {
    const sma = ta.sma(close, 20);
    const distance = Math.abs(close - sma) / sma * 100;

    spline(sma, {title: "SMA"});
    spline(distance, {title: classify(distance)});
}