If you're new to EA development, here's the basic skeleton every Expert Advisor needs: OnInit() — runs once when the EA loads. Set up indicator handles, validate inputs, check license/permissions here. OnTick() — runs on every price tick. This is where your trade logic lives (entry conditions, exit conditions, trailing stops). OnDeinit() — cleanup when the EA is removed (release indicator handles, close panels, etc.). A few things that trip up beginners: Always use CTrade (from Trade.mqh) instead of raw OrderSend() — much easier to manage. Don't forget broker-side stop loss/take profit if you want trades protected even if MT4/5 disconnects. Test on a demo account with real spread/slippage conditions before going live — strategy tester results can be misleading if you don't model slippage.
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