Ex4 to MQ4 Decompiler 4.0.432 is a software tool designed specifically for decompiling EX4 files, which are compiled files used in the MetaTrader 4 (MT4) platform, to MQ4 files, which are the original source code files used to create MT4 programs. The software claims to be able to decompile EX4 files with high accuracy, allowing users to recover their original source code.