Nice sound effects, but the two different alerts should give different sounds.  Duhhh!

Bid = buying at, Ask = selling at.  The bid goes on the left.  People read left to right, and the smaller number goes on the left.  Might as well use the standard trading terminology and lay out the screen in the way people expect.

The screen should be much smaller, so it doesn't waste screen real estate.

Sorry to keep harping on user interface issues, but if you want people to use the program, good UI is more important than good programming.  If you have good code and a bad UI, they'll use your code and write their own UI.

I was looking at the API... looks like it would be easy enough to add a settings screen for a user ID and password, and display the user's current BTC and dollar balances.  Then you could sound an alert when the balance changes.  That would tell the user when one of his open orders executed.  Heh, this is starting to look like a framework for a trading bot.