Key Takeaway: An EX4 file is intentionally designed NOT to be converted back to MQ4. The process you are asking about is technically called decompilation, and it is a reverse-engineering process.
Study the EX4 behavior:
This is legal because you are not copying code, just functionality (like creating a generic moving average after seeing one in MetaTrader). how to convert ex4 to mq4 free upd
Many developers will give you the MQ4 if you provide proof of purchase and sign a non-compete agreement. Offer to pay a small fee ($50–$100) for source access. Key Takeaway: An EX4 file is intentionally designed
For $50–$200, you can hire a coder on platforms like MQL5 Freelance, Upwork, or Fiverr to: Study the EX4 behavior:
This is legal, ethical, and far cheaper than the time wasted on broken decompilers.