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backtest-kit brings algorithmic trading engine to Node.js with unified live and backtest mode

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A new open-source library called backtest-kit has been released for the Node.js ecosystem, bringing algorithmic trading capabilities previously dominated by Python tools like Backtrader and Freqtrade. The toolkit allows developers to write a single trading strategy that runs identically in both backtesting and live trading modes, with only the clock source switching between historical data and real-time market feeds. The architecture is designed as a full trading engine rather than a simple backtester, meaning the same code path handles signal generation, position management, and order execution across all modes. The project includes over 1,030 unit and integration tests to ensure backtest and live execution paths remain consistent. It integrates with the CCXT library for exchange connectivity and requires minimal boilerplate to define an exchange, a historical frame, and a strategy.

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