Migrating old MQL4 to new MQL4

Originally Posted by newdigital

seems - flooding.
I delete some of his posts.

Migrating old MQL4 code (pre-2014 build 600) to the new MQL4 language (post-build 600) can be confusing because the language changed dramatically. T

Big thing with old-to-new MQL4 migration is not only syntax, it’s folder structure and compiler behavior after build 600. I’d back up the old terminal, move EAs/indicators/includes/libraries manually into the new MQL4 folders, then recompile and fix errors one by one instead of trying to patch everything blind at once. Old EX4s may run for a while, but relying on source that actually compiles clean is safer long term