Can this be removed from between my 5 year member tag and avatar?

 

No, there is no way to remove the iTrader rating from displaying on just your profile. It is a global option that is visible to help members in the community by allowing to view prior feedback for Marketplace transactions.

 

Then why am I like the only person that has it?

 

It appears for you because you have a score and have been rated, atleast once (twice). It does not appear for those who have not been rated and have no score. In other words, it does not appear to simply show a 0.