+------------------------+ +------------------------+ | .MQ4 File | == Compile ==> | .EX4 File | | (Readable Source) | | (Binary Executable) | | • Written in MQL4 | | • Read by MT4 only | | • Fully editable | | • Protects logic | +------------------------+ +------------------------+
Before searching for a converter, you must understand what these files represent.
Because decompilation can violate intellectual property rights and often yields broken code, consider these alternatives: convert ex4 to mq4 online free fix
Even if a specialized software extracts code from an old file, it will not look like the original source code. You will see:
2–10 hours per EA/indicator for an experienced coder. Money cost: $0 – $150 (some decompilers require payment). Fix capability: Low to medium — you will likely need to rewrite 30% of the logic. +------------------------+ +------------------------+ |
When you do successfully get a decompiled .mq4 file, you will likely encounter a few common problems. Here is a quick overview of the issues and potential fixes to help you in the "fix" stage:
If you still need to recover a critical EA: Money cost: $0 – $150 (some decompilers require payment)
The safest way to get the MQ4 file is to contact the original author of the EA or indicator. Study Open Source:
: There is no legitimate, safe website that lets you upload an EX4 file and instantly download a perfectly fixed MQ4 file for free.