AI Trader for MT5 is a comprehensive engineering framework for trading systems built around MetaTrader 5, MQL5, Python, and large language models. It empowers traders and teams to integrate strategy rules, risk management, signal tracking, trade review, and AI-assisted analysis into a cohesive, maintainable, and testable automated trading toolchain. Designed for those struggling to implement stable Expert Advisors (EAs) or lacking robust risk control, logging, monitoring, and parameter management in existing EAs, this project focuses on engineering trading logic and systematizing the trading process rather than promising guaranteed profits. It offers a robust solution for transforming trading ideas into reliable, automated processes.