Error code zero means no error.
Check your return codes, and report your errors (including market prices and your variables). Don't look at GLE/LE unless you have an error. Don't just silence the compiler (MT5 / MT4+strict), it is trying to help you.
What are Function return values ? How do I use them ? - MQL4 programming forum (2012)
Common Errors in MQL4 Programs and How to Avoid Them - MQL4 Articles

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Hi Guys.
Please help me understand why the attach EA does not execute any trade as it returns Error Code 0.
Thank you in advance.