Library term·Algorithmic trading
Writing Your First MQL5 Expert Advisor
Scaffold OnInit/OnDeinit/OnTick, wrap trading in guards, log everything — smallest viable strategy first.
Authored by·Editorially reviewed
Onur Erkan YıldızFounder, Financial Engineer · CMB-licensed
Higher education in Financial Engineering and Money & Capital Markets. SPK (Turkey CMB) licence. 16 years across institutional markets, research, and quant-driven analytics.
Overview
Begin with risk modules: spread filter, time window, max positions. Only then code entry logic.Practical takeaway
Use OrderCheck/OrderSend patterns with explicit slippage tolerance; handle TRADE_RETCODE branches.How this connects to Finvestopia
Bridge learning with Finvestopia risk/reward articles — encode the same R:R discipline your EA evaluates.Related entries
Educational content authored by our team — informational only, not investment advice.