Hey i know what trust rating are and how it goes. But have few concerns about the trust ratings here :

1) Obviously people with red and the negative feedback ones but why some members have green positive trust and others have plain black text trust??

2) what is this trust depth is all about

3)why few user show no trust or only 1 or 2 trust under their name but when actually visiting their profile and checking they actually got plenty of positive one so why others reviews are not sowing up

4) while writing a feedback what decides weather it is a positive rating or a negative  ??