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Fix MT5 errors

MT5 trade and compile errors explained: invalid stops, error 4756, not enough money, requotes and MQL4 code in MT5, with the MQL5 fix for each.

Error codes: 130 / 10016 Invalid stops · 4756 Trade request failed · 10019 Not enough money · 10004 Requote · 10015 Invalid price

• “Not Enough Money” in MT5: How to Validate Lot Size Before Sending an Order — Nov 7, 2026 — Prevent the MT5 not enough money error by validating lot size, calculating required margin and checking trade requests in MQL5.
• “OrderSend – Wrong Parameters Count” and Other Porting Errors — Nov 7, 2026 — Learn why MQL4 OrderSend calls fail in MQL5 and how to convert trade requests using MqlTradeRequest, MqlTradeResult and CTrade.
• Invalid Stops (Error 130 / 10016): Stop Level and Freeze Level Explained — Nov 7, 2026 — Understand MT4 error 130 and MT5 error 10016, how stop and freeze levels work, and how to prevent invalid-stop errors in your EA.
• Lot Size Normalization in MT5: Min Lot, Lot Step and Max Lot — Nov 7, 2026 — Learn how MT5 lot size normalization works, including minimum volume, maximum volume and lot step, with practical MQL5 code examples.
• MQL4 Compile Errors in MT5: “Undeclared Identifier Ask/Bid” and Friends — Nov 7, 2026 — Learn why MQL4 variables like Ask, Bid, Point and Digits cause compile errors in MT5, and discover their correct MQL5 replacements.
• MT5 Error 4756: What It Means and How to Fix It — Nov 7, 2026 — Learn what MT5 error 4756 means, how to identify the underlying trade request failure, and how to troubleshoot it in MQL5.
• Requotes, Off Quotes and Invalid Price: Handling Trade Server Errors — Nov 7, 2026 — Understand MT5 requotes, off quotes and invalid price errors, their causes, and practical MQL5 solutions for more reliable EA execution.
• Why Your EA Works in the Tester but Fails Live — Nov 7, 2026 — Why an MT5 Expert Advisor behaves differently in the Strategy Tester and on a live account, and how to diagnose execution, broker and market differences.