OpenAlgo Charts
Claim this toolSelf-hosted HTML5 charting library with zero dependencies
Free, no paid tierVisit WebsiteFreeVisit Website
Tracked since2026
The Bottom Line
- Price
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Key facts
- OpenAlgo Charts is a free, open-source HTML5 canvas charting library with zero dependencies, offering 102 indicators and 85 drawing tools.
- It provides a complete trading terminal experience, including order tickets, position lines, and a depth ladder, all self-hosted with no telemetry.
- The library is lightweight (under 220 KB) and modular, loading only the components you need, and supports bar replay and multi-timeframe analysis.
What is OpenAlgo Charts?
OpenAlgo Charts is a self-hosted, open-source charting library written entirely in HTML5 canvas with zero runtime dependencies. It provides a complete trading terminal experience, including 102 built-in indicators, 85 drawing tools, order flow analysis, and a full trading interface, all in a lightweight package (under 220 KB total). The library is designed to be embedded in any web application by simply providing a function that returns OHLCV bars. It supports advanced features like bar replay, multi-timeframe analysis, and a modular architecture that loads only the components you need. OpenAlgo Charts is ideal for developers and traders who want full control over their charting infrastructure without licensing fees or external dependencies, and it includes an Indian market default (IST timezone) but works globally.
Key Features
- 102 built-in indicators including moving averages, oscillators, bands, and volume studies
- 85 drawing tools including trend lines, channels, Fibonacci, and market profile with delta and value area
- Order flow analysis with volume profile, TPO, and footprint charts
- Bar replay functionality to step through historical data
- Trading terminal features: order tickets, position lines, and depth ladder
- Touch-optimized for mobile with pinch zoom and panning
- Zero runtime dependencies and self-hosted (Apache-2.0 license)
- Modular architecture: lazy-loads only the components you need (e.g., indicators, drawings, widgets)
Pricing
Free
OpenAlgo Charts is completely free to use with no hidden costs.
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OpenAlgo Charts FAQ
What are the system requirements to run OpenAlgo Charts?
OpenAlgo Charts runs entirely in the browser using HTML5 canvas, so there are no server-side requirements. It works on any modern browser (Chrome, Firefox, Safari, Edge) and can be embedded in any web page. The library is self-hosted, meaning you host the JavaScript files yourself, and it has no runtime dependencies, so no additional libraries or build tools are needed.
How does OpenAlgo Charts handle real-time data updates?
OpenAlgo Charts uses a subscribeBars function to receive live updates. You provide a function that returns historical bars, and then you can call subscribeBars to push new bars as they arrive. The library handles the rendering and updates automatically, so you don't need to manage the chart state manually.
Can I use OpenAlgo Charts with my own trading strategy or broker?
Yes, OpenAlgo Charts is broker-agnostic and can be integrated with any backend that provides OHLCV data. It includes a trading terminal with order tickets and position lines, but the actual order execution is handled by your own backend or via OpenAlgo's execution engine, which supports 35+ brokers. You can connect it to your own strategy logic or use OpenAlgo's strategy execution features.
Is OpenAlgo Charts truly free for commercial use?
Yes, OpenAlgo Charts is open-source under the Apache-2.0 license, which allows free use, modification, and distribution, including for commercial purposes. There are no hidden fees, no licensing costs, and no telemetry or call-home features. You can self-host it and use it in your own applications without any restrictions.
What is the file size of OpenAlgo Charts and how does it affect performance?
The core widget (including candles, axes, crosshair, and theme) is about 76.52 KB, and the full terminal with all features is 215.04 KB. The library uses lazy loading, so if you only need basic charts, you only download the core. This makes it lightweight and fast-loading, even on mobile devices.
Does OpenAlgo Charts support Indian market-specific features?
Yes, OpenAlgo Charts has an Indian market default, with IST as the default timezone. It also integrates with Indian brokers through OpenAlgo's execution engine, and supports features like option chains, OI tracking, and volatility surfaces that are popular in Indian trading. However, it works with any market worldwide by configuring the timezone and data source.
Can I extend OpenAlgo Charts with custom indicators or drawing tools?
Yes, OpenAlgo Charts provides a documented contract for writing custom indicators. You can add your own studies by following the indicator API. Similarly, you can extend drawing tools, though the built-in set of 85 tools covers most needs. The library is designed to be extensible, and the source code is available for modification.
How does OpenAlgo Charts handle data privacy and security?
OpenAlgo Charts is self-hosted and has no telemetry, no analytics, and no call-home features. All data stays within your own page and server. There is no account required, and the library does not send any data to third parties. This makes it suitable for traders who require full control over their data.
Source: openalgo.in