Personal experience + the rules:
Forum on trading, automated trading systems and testing trading strategies
JD4, 2015.07.03 20:12
I thought it would be helpful to have an easy to find spot to see what the rules are on this forum, because there has been some confusion with them before (from me for sure, possibly with other people as well).
(copied from https://www.mql5.com/en/about/rules)
Hopefully this helps everyone out.
Some users understand themselves to become more significant active users if they were banned on this forum at least onces. :)
Oops...that's true I was never banned.
But Sergey yes (not by me)