This is the human-readable text file written in the MQL4 programming language. Developers write, edit, and view logic in this format using the MetaEditor tool.
Ghidra is a robust open-source reverse engineering tool. The ex4_ghidra_loader loader, despite its potential removal from GitHub, is mentioned as a stable solution for loading EX4 files into Ghidra for analysis, supporting newer MT4 builds.
Today, if you search GitHub for "EX4 decompiler," you'll find numerous repositories like ex4-to-mq4-2023 AdibSadman192/Ex4-to-Multiple-Readable-Language-Converter ex4 decompiler github
This is one of the most visible results. It is an unofficial CLI wrapper for the old "EX4-TO-MQ4 Decompiler".
The structural flow of the program is deliberately scrambled during compilation, making it difficult for an automated tool to trace the original logic. This is the human-readable text file written in
A critical point often overlooked in GitHub discussions is legality. The MetaTrader 4 End-User License Agreement (EULA) explicitly prohibits reverse engineering, decompiling, or disassembling the software or its compiled files. Hosting an EX4 decompiler on GitHub does not automatically violate GitHub’s Terms of Service (which allows reverse engineering tools for interoperability), but using it on a commercial EA almost certainly violates civil law in most jurisdictions.
: You can import the .ex4 file, set the language to x86:LE:32:default , and run auto-analysis to find critical functions like OnTick . The structural flow of the program is deliberately
Decompilation attempts to reverse this compilation process. While older versions of MT4 (before build 600) used simple encryption that made decompilation trivial, modern MT4 builds utilize advanced encryption, obfuscation, and strict compression algorithms. The Reality of EX4 Decompilers on GitHub
Many popular "paid" EAs have open-source versions on GitHub or the MQL5 codebase that provide similar logic.
Whether you’ve lost your original source code or you’re trying to understand the logic behind a proprietary tool, you’ve likely searched for an .