I personally believe that a pop-out box would function better.
Down near the star menu should be a trade icon. Clicking this will pop up a box with all the avilable trades. Here you can filter your trades for items you're looking for, as well as items to place on sale.
This function could also have it's own trading chat channel along side this market feature, or at the bottom. This would allow people to trade while, at the same time, keeping an eye on the current economy.
Basically, a pop-out trade channel and trade area. I find the trade is in the wrong place. Everything else in those tabs is for chat, except trade.
A new feature should be implemented giving the trade feature it's own section.