How about creating a new tab so that you can view ALL of your current Business Deals (from trading) at once? This would be a spectacular improvement. Perhaps some type of notification system so that you can see what trades you've offered OR clicked on BEFORE they are completed and subsequently added/subtracted from your storage?
Another great suggestion I heard regarding Trading, is to implement a "Repeat Last Trade" button, so you don't have to hunt & peck around on your storage tabs each time, if you're doing the same trade over and over. This would be another awesome improvement for ease of use in trading.