Decompiling an EX4 file – the process of reverse engineering the executable code used in Forex trading – is becoming an increasingly useful tool for experienced traders who want to gain more control during active trading. This article will discuss the benefits and drawbacks of decompiling EX4 files, as well as how they work and how they can help traders become better informed and more successful in their trades. 4 is not possible because it is an executable file. Executable files are compiled programs and cannot be decompiled. Decompilation of programs requires the source code which is not available for ex4 files.