Some are referring to very old EX4 files (pre‑2014) that used a less secure format. Others are scammers trying to sell fake services. A few are using disassembly (producing assembly code, not MQL4) and misrepresenting it as decompilation. Be very skeptical of any claims of successful modern EX4 decompilation.
If you see claims like “100% working decompiler for all EX4 files,” treat them as scams. The security landscape around these tools is bleak. how to convert ex4 file to mql4
No. MetaEditor can open EX4 files as binary files, but it cannot decompile them back to MQL4 source code. This is a common misconception. Some are referring to very old EX4 files
Do not trust online "EX4 to MQL4" converters. They rarely work as advertised and pose a massive security risk to your computer and trading accounts. Focus on finding developers who provide open-source code or request the source code directly from the creator. If you are looking to learn more, I can help you find: Open-source EAs in the MQL5 community to study. A list of reputable MQL4 developers to hire. Be very skeptical of any claims of successful
Given these realities, what should you do if you need the MQL4 source code for an EX4 file?