When working through many trades simultaneously, someone will often propose trade items that were a want when they created the trade, but have since been accepted in another trade and are no longer needed.

I also occasionally have people propose, out of the blue, a card to trade that I do not have on my want list.

In both cases, I want to know that the item is not something I explicitly asked for, so I can more easily determine whether it should stay in the trade. This is only really relevant before a trade is confirmed, as in many cases after it's confirmed, the item should no longer be in the want list.

This could be implemented as easily as having the color block for the # in the incoming card row to be a different color similar to how it looks when none are available. Instead of red, it could be yellow or orange (take caution this may not be needed)