How a Trading Bot's Risk Logic Outgrew Its Execution Engine

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A developer building a Python-based algorithmic trading platform on Bybit documents how early architectural shortcuts created long-term structural problems. Initially, risk management logic like Stop Loss and Take Profit calculations were embedded directly inside the Trade Execution Engine for simplicity. As the platform grew to include features like Trailing Stop, Break Even, Telegram controls, and Spot/Futures trading, the execution engine gradually absorbed responsibilities far beyond its original scope. The author reflects that prototype architectures optimise for speed while production architectures must optimise for change — two fundamentally different goals. This is Part 4 of an ongoing engineering series chronicling the platform's evolution from a simple trading bot into a modular, production-ready system.

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