For a non-programmer, the output is useless. For a programmer, it may take 10+ hours to fix—more time than writing from scratch.
Converting EX4 to MQ4 for free is a high-risk task that rarely produces usable, clean code. While community-based help or specific GitHub projects may work for older files, you should prepare for a significant amount of manual code debugging. Always scan any tool you download for viruses, and be wary of "too good to be true" online converters.
But more realistically:
This is a critical question. Even if you could convert EX4 to MQ4 for free, should you?
Several free decompilers have been circulated online. One of the most commonly referenced is the , which is said to be effective for a wide range of EX4 files, especially those from builds before 2016. You can find this tool on various code-sharing platforms like GitCode, AtomGit, or CSDN.
: Downloading "cracked" decompiler software from untrusted sources often results in the installation of viruses that can compromise your trading accounts or financial data. Legitimate Alternatives