Decompiling EX4 files (compiled MetaTrader 4 executables) back to MQ4 source code is generally:
Most legitimate developers encrypt or obfuscate their EX4 files specifically to prevent decompilation. Ex4 To Mq4 Decompiler Github
If a decompiler requires you to load your EX4 files, it could easily upload them to an attacker’s server, revealing proprietary strategies. Most legitimate developers encrypt or obfuscate their EX4
Short answer: No, unless you are a reverse engineering researcher in a controlled, isolated environment, with legal consultation. If a decompiler requires you to load your
Long answer:
| If you want to… | Decompiler from GitHub | Recommended alternative | |----------------|------------------------|--------------------------| | Fix a bug in an EA you bought | ❌ Illegal, poor quality | Ask developer for fix | | Learn a trading strategy | ❌ Potential malware | Read open-source MQL4 code | | Remove expiry/account limit | ❌ Copyright violation | Avoid dishonest developers | | Recover your own lost source code | ⚠️ Might work for old EX4 only | Contact MetaQuotes / backup better | | "Just see how it works" | ❌ Legal risk | Run EA on demo + journal logs |
Some developers share experimental scripts that parse EX4 headers or extract basic metadata, but these rarely produce usable MQ4 code.