MQL5 from Scratch: Build an Expert Advisor Step by Step
Technical revision: 1 October 2026 · Educational materialOn this pageDefine the behavior before writing the entryCreate a small project in MetaEditorSeparate initialization, observation and executionAdd execution only after the log makes senseCheck observable behaviorA first Expert Advisor should help you see what the terminal is doing. Start with an observable program, then add one responsibility at a time. This guide takes you from event handlers to a moving-average demonstration whose order submission is disabled by default. Define the behavior before writing the entry Our example reads two exponential moving averages on the chart symbol and timeframe. A signal is a…