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Hello Everyone,
I've checked a tutorial to perform a bollinger band expert advisor on youtube (Coding a Simple Bollinger Band Expert Advisor in MQL4 - Start to Finish - YouTube). This tutorial is for MQL4, so I tried to translate it to MQL5 but now I have the 'undeclared identifier" on a ' if ' condition statement with a function. Do you know why ? Here's the MQL5 code :
Thank you :)