A tool where the source code is visible so they know it’s not malware.

Ex4 to Mq4 Decompiler GitHub Verified: Reality vs. Risks In the world of MetaTrader 4 (MT4) trading, the transition from an executable .ex4 file back to its source code .mq4 is a topic of intense interest. Whether you've lost your own source code or want to audit a third-party Expert Advisor (EA), you’ve likely searched for an solution.

Decompiling someone else's commercial EA without permission is a violation of copyright laws and EULAs.

They might explain the logic of bytecode but don't provide a functional tool for end-users. Why Decompilation is Harder Today