it seems to me they persistent 1 month.
See doc
Oh yes, that's fine.
But I've deleted them. So they're supposed to stay deleted even after restarting MT4.
But the variables remain despite any attempt to delete them.
Try to use: GlobalVariablesFlush(); after your deletion.

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Hi,
After build 940, global variables seem to repeat themselves and persist even AFTER deletion and restart of the mt4 platform.
I seem to have global variables dating back to December of 2015....
anyone else has this problem or know how to resolve this?