Does trust take some time to be added?
I did a transaction in which I took the risk, I rated the other user but I'm not sure the user rated me...
At some point I did see that he had rated me but my trust is still 0!
So? Sometimes others might not take the time to give you trust.
DO NOT ASK THEM AT ANY TIME.Wait for it, do more trades, and contribute to the forum, and in time you'll see quite a few positive trust appearing.