iTrader is equal to feedback on eBay. After you make a deal the buyer/seller can leave short comment about you and give you a positive feedback or negative one. here is your iTrader page http://forums.digitalpoint.com/itrader.php?u=244942
It gives more confident to the buyer if you have something selling on BST. It can access by clicking the itrader numbers ..
iTrader is the rating exchanged by the iTrader on any kind of transaction which involves deal of more than $5. The higher the iTrader the greater is the reliability of the member. You can see it in the profile of the member.