Trade safely, code legally, and always back up your MQ4 files. Have you successfully recovered an MQ4 from an EX4 using a legitimate method? Share your experience in the comments below (but no links to illegal decompilers, please).
You can attempt to recover some information, but not a working source code. Here is what you can do for free: Method 1: Decompilation with Legacy Tools (For Old EX4 Files Only) If you have an EA that was compiled before 2014 (Build 509 or lower), you can try tools like EX4 to MQ4 Decompiler v4.0.0.0 (available on GitHub). how to convert ex4 to mq4 free upd
Searching for "how to convert EX4 to MQ4 free upd" is one of the most common queries in the algorithmic trading community. The promise of a free, updated decompiler sounds like the holy grail. Trade safely, code legally, and always back up
Since you own the copyright, you are legally allowed to decompile your own work. Use a legacy decompiler on an offline PC. Even then, the output will be messy. Expect to spend hours cleaning variable names. You can attempt to recover some information, but