If you need MQ4 source but only have EX4, consider these legal paths:
| Approach | Feasibility | Risk | |----------|-------------|------| | Contact original developer | High – pay for source code | None | | Rewrite from scratch | Medium – analyze behavior (trades, outputs) | Low | | Use open-source alternatives | High – GitHub has 1000s of free EAs | None | | Black-box testing | Low – limited to external behavior | Low | | Hire reverse engineer (illegal) | Medium – expensive and shady | Very high |
No legitimate service offers EX4 → MQ4 decompilation for modern files.
Calculate key parameters at runtime based on account number or timestamp. A stolen/decompiled EX4 will fail unless the cracker also patches those checks. decompile ex4 to mq4 github
Original local variables (int i, double price) become stack offsets. The decompiler guesses which offsets belong together – but names are lost forever.
Decompilation is not like unzipping a file. It is more like reconstructing a recipe from a baked cake. The original variable names, function order, and even some logic are lost during compilation.
A significant portion of search results consists of repositories with little to no code. If you need MQ4 source but only have
Decompiling EX4 files without permission is typically:
Most EX4 files are proprietary trading strategies that developers rely on for their livelihood. Only decompile EX4 files that:
Scenario: Trader has old EA from 2012 (build 425 EX4). Lost source due to hard drive failure. Calculate key parameters at runtime based on account
Action: Finds ex4_decompiler_legacy on GitHub (Python). After minor fixes, outputs readable MQ4 with generic names.
Result: Successfully recovers 90% of logic. Manual renaming yields fully functional EA. No legal issue because original was self-created.
Takeaway: Decompilation works only for old, non-obfuscated EX4.
If you need MQ4 source but only have EX4, consider these legal paths:
| Approach | Feasibility | Risk | |----------|-------------|------| | Contact original developer | High – pay for source code | None | | Rewrite from scratch | Medium – analyze behavior (trades, outputs) | Low | | Use open-source alternatives | High – GitHub has 1000s of free EAs | None | | Black-box testing | Low – limited to external behavior | Low | | Hire reverse engineer (illegal) | Medium – expensive and shady | Very high |
No legitimate service offers EX4 → MQ4 decompilation for modern files.
Calculate key parameters at runtime based on account number or timestamp. A stolen/decompiled EX4 will fail unless the cracker also patches those checks.
Original local variables (int i, double price) become stack offsets. The decompiler guesses which offsets belong together – but names are lost forever.
Decompilation is not like unzipping a file. It is more like reconstructing a recipe from a baked cake. The original variable names, function order, and even some logic are lost during compilation.
A significant portion of search results consists of repositories with little to no code.
Decompiling EX4 files without permission is typically:
Most EX4 files are proprietary trading strategies that developers rely on for their livelihood. Only decompile EX4 files that:
Scenario: Trader has old EA from 2012 (build 425 EX4). Lost source due to hard drive failure.
Action: Finds ex4_decompiler_legacy on GitHub (Python). After minor fixes, outputs readable MQ4 with generic names.
Result: Successfully recovers 90% of logic. Manual renaming yields fully functional EA. No legal issue because original was self-created.
Takeaway: Decompilation works only for old, non-obfuscated EX4.