A function to write debug/output text to the Experts or Journal log. Since MQL4/MT4 has no debugger, developers use Print() (or Comment()/Alert()) at key points to trace logic. In MT5, Print() logs can still be very useful alongside the debugger. For example: Print("Price=", Ask, " ticks=", TicksTotal);. In c#, an equivalent is Print() (cTrader’s logger) or Console.WriteLine() if debugging outside the platform.

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