there have a mistake in an code example at https://www.mql5.com/en/docs/event_handlers/onchartevent
Yes, but if you create a topic each time there is an error in the documentation you will open a lot of them.
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original code：Print("Launched the EA ",MQLInfoString(MQL5_PROGRAM_NAME));
should be:Print("Launched the EA ",MQLInfoString(MQL_PROGRAM_NAME));