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
Malicious code can be injected into your MT4 terminal to copy your trades or drain your account. 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