Technically: Partial, ugly, non-functional recovery is possible with risky free tools.
Practically: No, you cannot get clean, editable, compilable MQ4 code for free from a protected EX4.
Legally & Safely: Your only free option is to ask the developer or recreate the logic yourself.
There is no safe, legal, free way to convert a modern EX4 file back to clean, editable MQ4 code.
If a website promises "Free EX4 to MQ4 Converter" with no strings attached, it is either:
Your best free option is to learn MQL4 yourself (free tutorials on MQL5.com) and recreate the functionality you need. It’s more rewarding, fully legal, and safe.
Disclaimer: This information is for educational purposes only. Respect software copyrights and license agreements. Reverse engineering software without permission may violate laws in your jurisdiction.
I understand you're looking for a way to convert an EX4 file (compiled MetaTrader 4 executable) back to MQ4 (source code) for free.
However, I need to give you a direct and honest answer first:
No. MT5 uses a completely different compilation model and bytecode structure. Free MT5 decompilers are extremely rare and ineffective. How To Convert Ex4 To Mq4 Free
The internet is littered with promises of free EX4 to MQ4 converters, but for modern MetaTrader 4 files, they are largely myths. The compilation process used today is secure, designed specifically to prevent this kind of reverse engineering.
If you are looking to convert a file, the safest and most honest route is to contact the original developer for the source code. If that isn't possible, treat the EX4 file as a "black box"—you can use it, but you cannot change what’s inside. In the world of trading, security is worth more than a free download.
Converting an EX4 file (compiled MetaTrader 4 code) back to its MQ4 source code for free is technically complex and often carries significant security risks. While tools exist, they generally only work on very old versions of the MetaTrader platform. Core Challenges and Technical Reality
Compilation Type: MQ4 files are human-readable source code. EX4 files are compiled binary versions used for distribution.
Build 600+ Limitation: Most free decompilers, such as the widely mentioned EX4 to MQ4 Decompiler 4.0.432, only work on files compiled with MT4 Build 509 or lower (pre-2014).
Modern Security: MetaTrader 4 Build 600 and higher uses a different compilation method that generates true binary code rather than byte code, making it nearly impossible for standard free tools to decompile them. Common "Free" Methods and Tools Description Limitations Legacy Decompilers
Software like Decompiler 4.0.432 attempts to restore code by analyzing the binary. Does not work on modern EX4 files; high risk of malware. Ghidra / x32dbg Advanced reverse engineering tools used by experts. There is no safe, legal, free way to
Extremely difficult; produces C-like code rather than original MQL4. iCustom Function
A coding workaround that calls an EX4 indicator's data into a new EA. Does not reveal the original source code. Critical Security and Legal Risks
Software decompile ex4 to mq4 - Soacinena1972's Site on Strikingly
I can’t help with converting or bypassing protections on proprietary compiled files (like EX4) to source code (MQ4). That would enable unauthorized access to someone else’s intellectual property.
If your goal is legitimate, here are lawful alternatives you can pursue:
If you want, I can:
Which of those would you like?
I can’t help with converting or cracking proprietary/executable trading files (EX4 → MQ4) or provide instructions for bypassing software protections. That's disallowed.
If you want a legitimate alternative, here are safe options:
If you want, I can:
Even with the best free decompiler, the output MQ4 will have these fatal flaws:
| Original MQ4 Feature | After Decompilation |
|----------------------|----------------------|
| Meaningful variable names (RSI_Value) | var_1, var_2, var_300 |
| Comments explaining logic | All comments removed |
| Clean loops and conditions | Goto statements and spaghetti logic |
| Proper function structures | Broken or missing functions |
| Compiles successfully | Fails to compile |
You will spend more time fixing the decompiled mess than writing the strategy from scratch.