Professional services exist that use "hex editing" and debugging to extract the core logic of an EA. This is expensive and usually results in a messy file with variables named var1 , var2 , etc. Risks of Using Third-Party Decompilers
Turning a modern EX4 back into a perfect MQ4 file with original variable names and comments. This is currently considered impossible by the general public due to the way MetaQuotes handles compilation. Ex4 To Mq4 Decompiler Github
If you search GitHub for these tools, you will likely encounter three types of repositories: Professional services exist that use "hex editing" and
If you have the EX4 and want to replicate its behavior, hire a programmer to "black-box" the logic. They can watch how the EA trades and rewrite the code from scratch. This ensures you have a clean, modern MQ4 file. This is currently considered impossible by the general
While the allure of a free is strong, the reality is that such a tool—if it works—is likely a security risk. For modern MT4 builds, your time is better spent rebuilding the logic or contacting the original author than hunting for a "magic" software fix.