Hello! This is my first suggestion and it suddenly came to me, but I feel it would be a nice touch and help out the community!

If you're anything like me then you often view trades you may have already seen/offered on and forgotten about and then offer again only to be met with a response along the lines of "Again..?".
My suggestion is to add something to distinguish between new trades and ones you have already viewed! An example of how this could be done is by making Trades you have already viewed a darker colour similar to Lioden messages or maybe a private "Viewed __ times" bar?

This is only a minor detail but If you feel like it is a good idea feel free to support or give your own ideas on how this can be improved/Reasons you dont think this would work!

General idea: Add a way to distinguish between trades you have already viewed.