What is itrader? Please post a link with an explanation.
Itrader is a vbulletin addon, i don't know if simple machines has the same add on. It is basically the same as trust system but more improved and only for trading feedback.
http://www.vbulletin.org/forum/showthread.php?t=102965Features:
Rate another member: Positive / Negative / Neutral
Specify in each transaction: Buyer, Seller, or Trade
Leave multiple comments about the deal
Dates & IPs are all recorded to prevent abuse
Specify a thread URL to the deal
Advanced URL checking
Display ratings over time
Filter based on Buyer/Seller/Trade/or feedback they left for others
Users can edit/delete ratings left for others (time based limitation)
iTrader Admins can edit/delete anyone's ratings (just incase)
PM notification when new rating or comment is left
Per-usergroup permissions
Lots of admin controllable options