- Zero is not a string. Zero is not a bool. You should write a self documenting function instead of calling iCustom directly, see Detailed explanation of iCustom - MQL4 forum
- Always attach the indicator or post a link. Don't expect us to go hunting for the specific version you are using.
- Print out your variables, including _LastError and find out why.
whroeder1:
thank you
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what is my mistake ? why i failed to call COG indicator?? thanks