If you decompile an EX4 you did not write yourself (e.g., purchased from MQL5 marketplace, a freelancer, or bundled with a signal), you are likely infringing copyright. Exceptions exist only for:
This trend suggests that MetaQuotes is winning the cat-and-mouse game. Relying on decompilation for EX4 is already difficult; for EX5 it is nearly impossible. decompile ex4 to mq4 github
The result is MQL4-like syntax, but with: If you decompile an EX4 you did not write yourself (e
No function name, no meaningful variable names, for turned into while . Logic is preserved, but readability is destroyed. purchased from MQL5 marketplace
To separate marketing hype from reality, here is what a decompiler actually does when you run it on an EX4: