Feedback is given if you are "friends" with someone or if you "liked" their post amongst other reasons.
It isn't based upon trades, therefore you shouldn't presume someone is trusted just because they have a high reputation, which when it comes to trading means nothing.
Other factors should be looked at such as if they have a vouch thread, if so - how many vouches do they have? When was the last time they middlemanned?
I see too many people just trusting people because of "rep" and then getting fucked over. Common sense doesn't go amiss.
Anyway back on topic - OP hopefully you'll be back in the green soon.