Instead of searching for "decompiler," search for "MQL4 recovery" or "MT4 forensic tools." These terms often lead to more professional developer resources. Conclusion

Most legitimate "decompilation" today is actually manual recoding . Experts watch how the EA behaves on a chart and rewrite the logic from scratch in MQ4. How to Proceed Safely

Since the MetaTrader 4 "Build 600" update years ago, MetaQuotes significantly hardened the encryption of EX4 files, making modern decompilation nearly impossible for standard tools. Finding EX4 to MQ4 Tools on GitHub

If the "decompiler" itself is open-source (e.g., written in Python), read the code to ensure it isn't sending data to an external server.

If you find a tool on GitHub that claims to perfectly restore a modern EX4 file to its original MQ4 source, you should be skeptical for several reasons:

Because the demand for decompilers is high, some GitHub repositories are created to distribute . They may promise a "2024 Working EX4 Decompiler" but actually contain Trojans designed to steal your MT4 login credentials or private keys. Always check the repository's star count, issue history, and commit frequency. The Reality of Modern Decompilation

This is the human-readable text file where a developer writes the logic using the MQL4 language.

Some developers host Python or C++ scripts on GitHub designed to assist in . Rather than a "one-click" decompiler, these tools help experts look at the bytecode or hex data of an EX4 file. These require significant programming knowledge to use effectively. 3. "Scam" or Malware Repositories