https://www.mql5.com/de/articles/1572
https://web.archive.org/web/20160315...MQL4.com/56885
https://www.mql5.com/en/forum/326086
https://www.mql5.com/en/articles/359
Hier noch eine Info von einem Forumthread (kann nicht garantieren, dass das genauso stimmt):
From what Renat (CEO of Metaquotes) said :
New ex4 are native code (like DLL) and no more pseudo code. So they are more difficult to decompile.
ex4 are compressed (or other obfuscation technique not known) so have decompiled it's hard to understand it.
ex4 for Market are encrypted. The exact technique used is not publicly available.
I report these information from memory, so I hope I don't make a mistake. Also I don't check these informations in practice.
How to LOCK/Encrypt EA Big changes for MT4, MetaTrader 4 Client Terminal