Ok after staring at this thing for an hour...
I think perhaps getting rid of the commodities list in the middle and going only data entry mode for them. While commodity data is important; entering it is really the only time you interact with the commodity list. Now this depends somewhat on the trade tools getting beefed up. If the trade tools were more awesome, you'd use that primarily instead of looking through the commodities list.
Also, since I'm hoping the trade tools become a powerful interface, it will need it's own window in order to have room for all the complicated buttons and knobs and lists
So, now, we are faced with: Commodities is a window, trade tools is a window. The only thing that's left is Stations, and if they are alone on the main interface because there's nothing left, stations are effectively just a window as well.
Now I could attempt to make them all modeless dialogs, which means they can all be opened at the same time, but for the most part, you won't NEED them all open at the same time.
Let's see if you can follow this vision:
You run the app, and you only see a window with the Station List (and maybe notes on the side)
You Right-Click a station, and there will be a
Commodities... button. Also probably a button directly on the main interface.
Clicking the
Commodities... button opens up the commodities window (currently data entry mode). You could leave the window open, and click through Stations on the other window to see commodities change (just like you do now).
There would be a separate button, not related to commodities for
Trades
Hitting the
Trades button will open the Trades window (which will be an entirely new thing that's not created yet).
The Trades window will have all the tools for listing trades, best trades, round trip trades, etc.
All this accomplishes a couple things. The footprint of the app is smaller since everything is broken up into windows. Each major component having it's own window allows for more flexibility in adding controls and stuff without running out of room.
Might be worth a shot...