If you are decompiling a $30 EA for personal learning, a free tool is fine. If you are trying to recover a lost proprietary strategy worth thousands, pay for a professional service or rewrite from scratch.
The short answer is:
The internet is littered with promises of free EX4 to MQ4 converters, but for modern MetaTrader 4 files, they are largely myths. The compilation process used today is secure, designed specifically to prevent this kind of reverse engineering. How To Convert Ex4 To Mq4 Free
No. Comments, variable names, indentation, and sometimes logic order will differ. If you are decompiling a $30 EA for
: Most free tools (like EX4-TO-MQ4 Decompiler 4.0.432 ) only work for files compiled on MetaTrader 4 Build 509 or older (pre-2014). but for modern MetaTrader 4 files
15 minutes. Cost: $0.