: When you write code in MT4's MetaEditor, it is saved as an .mq4 file. When you compile it for use, it becomes an .ex4 file, which is binary and normally cannot be read or edited.
: Decompiled code often lacks original comments and may feature random variable names (e.g., instead of TakeProfit ex4-to-mq4-decompiler-4.0.401.1 225
In 2014, MetaQuotes released Build 600 , which fundamentally changed how MQL4 was compiled. Modern EX4 files use a different compilation method that generates binary code rather than byte code, making them virtually impossible to decompile with these older tools. Why You Should Be Cautious : When you write code in MT4's MetaEditor, it is saved as an
