I know about the diffence of code.
The question is about the website.
Both domaines seem to be connected and in same time not. My login of mql5 does not work on mql4 and reversely. While if I click on mql4.com/market it links me to mql5.com and applies my other login there. Still there is a mql4 forum with the mql4-login. Very confuzing. Please explaine...
Welcome to world of Metatrader.
Get used to being confused around here.