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Be wary of sites asking you to upload files or download "fix" patches. Tools like "ex4-to-mq4-decompiler-5.0.1.exe" have been flagged with high threat scores in security sandboxes.
✅ If you lost the source code but own the EA, ask the seller or developer politely. Many will provide the MQ4 if you prove purchase.
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If you need to modify a trading tool or retrieve a lost strategy, consider these legitimate and safe alternatives instead of looking for a sketchy online patch. 1. Contact the Original Developer
Instead of asking them to decompile the file (which many reputable programmers refuse to do due to legal and technical limitations), you should:
Malicious sites can bundle trojans or spyware into a returned file.
function in a new MQ4 file to pull data from the EX4 indicator without needing its source code. Contact the Developer
Most websites advertising a "free online EX4 to MQ4 converter fix" fall into three categories:
The few automated scripts that do output code usually generate a useless mess of variable names (like g_ibuf_84 , g_price_112 ) that will throw dozens of critical errors when you try to recompile it. How to Fix a Broken EX4 File Without Decompiling
When you compile an MQ4, the original variable names, comments, logic structure, and formatting are . There is no official or reliable "decompiler" that gives you back the original MQ4 exactly as the author wrote it.
The tool will throw an error stating the file format or build version is unsupported.
Use open-source projects on GitHub to learn MQL4 coding rather than trying to reverse-engineer closed-source files.
Provide chart examples of where the EA opens trades.
Automated trading on the MetaTrader 4 (MT4) platform relies heavily on MQL4 scripts. These scripts exist in two primary formats: .MQ4 (the human-readable source code) and .EX4 (the compiled, machine-executable file).
Several websites claim to offer free or paid ex4 to mq4 conversion. Some popular ones include:
After loading the file, click the "Decompile" or "Convert" button. The program will process the binary data and attempt to generate an .mq4 file. The decompiler will usually save the new .mq4 file in the same directory as the original .ex4 , or allow you to choose a destination folder.
If you cannot change the underlying code, you can often fix behavioral errors by altering the inputs in the EA's settings window:
If you genuinely need the source code of an indicator or EA, avoid the shady online converters and use these legitimate paths: 1. Contact the Original Developer