For developers, the arms race continues. Your best defense is not a binary file—it is business model evolution. Shift to subscription models, cloud-based logic (via WebRequest), or move to MT5 (where decompilation is significantly harder due to 64-bit native compilation).
An EX4 decompiler is a software tool designed to reverse the compilation process. It attempts to convert a compiled .ex4 file back into a readable .mq4 source code file. ex4 decompiler