Composer

Composer is a no-code platform for building, testing, and running investment algorithms in one web interface. It helps you assemble portfolios, automate trading, and review performance without writing code.

Build and test strategies

Composer uses a visual strategy builder, with templates you can start from or customize into your own algorithms. A simulator with historical data supports backtesting before you deploy a strategy to live markets.

Community strategies and analytics

Users share ready-made strategies that you can copy and adapt. Composer also includes tools to track portfolio performance and monitor results over time.

How it works

• Runs in a web browser (no extra software required)
• Subscription signup and payment happen on the official website
• Focused on US exchanges
• Requires connecting a brokerage account to access live markets

Composer is a fit for individual investors, analysts, and trading beginners who want to prototype and test algorithmic strategies quickly. Limitations include a US-market focus, fewer advanced professional tools, and the need for basic investing knowledge.