Run the EA in a visual strategy tester. Observe: When does it enter? What indicator values trigger exits? You can rewrite a functionally equivalent EA without ever seeing the source code. This is 100% legal.
Before diving into decompilers, it is crucial to understand the difference between these two file types:
A decompiler attempts to reverse the compilation process, turning .ex4 bytecode back into .mq4 source code. Free Ex4 To Mq4 Decompiler Software Applications
A search for "Free EX4 to MQ4 Decompiler" will yield thousands of results. However, users must distinguish between marketing hype and technical reality.
Not all decompilers are created equal. When evaluating free software, consider: Run the EA in a visual strategy tester
To understand the limitations of free tools, one must understand the file structure evolution:
Using unauthorized decompiler software carries significant risks beyond the technical failure of the tool. A decompiler attempts to reverse the compilation process,
Disclaimer: The information herein is for educational purposes. You should only decompile code you own the rights to or have explicit permission from the copyright holder.
Most commercial EAs are protected by copyright. Decompiling them to steal the trading logic and resell it as your own is illegal in most jurisdictions (violating DMCA, EU Copyright Directive, etc.). However, decompiling for personal use, education, or interoperability is legally murky but often tolerated if you are the original purchaser and do not distribute the source code.