Lightweight Charts™

An entire library of unparalleled usability and performance. Build financial charts that feel like native apps.

This is how Backtestx Chart looks

Experience the precision and performance of our charting engine in real-time. Interact, draw, and test indicator options below.

The standard for financial apps

Engineered for high-frequency updates and mobile-first experiences.

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Custom Drawings

Draw trend lines, Fibonacci retracements, arrows, and highlight zones directly on the canvas.

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Streaming updates

Push new data points in real-time without refreshing or stuttering.

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Open-source

Free to use, Apache License 2.0. Community-driven and stable.

High-performance

Canvas-based rendering engine that stays fast with thousands of bars.

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For devs, by devs

Simple API, TypeScript support, and zero external dependencies.

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Full styling control

Complete control over colors, grids, fonts, and interaction behavior.

Craft the Perfect Charting Experience

Experience the flexibility. Toggle between chart types and themes to find the perfect fit for your application's aesthetic.

Ready to transform your financial data?

Always free for commercial use. No registration required.

Explore the Documentation

Jump into any section of the library docs to start building.