ContourCanvas based charts for trading

Build interactive, high performance financial charts with a straightforward API.

Quick start

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Fast rendering

Canvas rendering keeps the chart responsive even with large datasets.

Streaming ready

'setData' and 'updateData' handle full reloads, clearing, and streaming updates.

Framework agnostic

Written in vanilla JS so you can use it anywhere.

Customizable

Use built-in themes or supply your own formatter, locales, controllers, and indicators.

Extendable

Overview

Contour is a low-level canvas charting engine focused on financial time series. It provides primitives to render candles, bars, area charts, indicators, plugins, and drawing tools while remaining lightweight.

Start with the Introduction, follow the Guide for data and runtime patterns, browse Integrations for framework snippets, and use the API Reference for signatures and event payloads. Upgrading from 0.9? Read MIGRATION.md in the repository.