: Many EXE files claiming to be decompilers on GitHub contain trojans. Always check code before running.
These were generally easy to decompile. Code could be recovered almost entirely.
: Some experts use IDA Pro for processor-level decompilation, though this yields binary code that is nearly impossible for most humans to read or edit. 4. Legal and Ethical Considerations
In the early days of MetaTrader 4 (before Build 600), the compilation process was simple. Old decompilers could easily reconstruct the original MQ4 code. Today, finding a working tool on GitHub is nearly impossible for several reasons: 1. Modern Encryption and Obfuscation
— If you created the EA but lost the source code, decompiling the EX4 you compiled yourself is generally considered acceptable.