Is there a way to do market orders or "all in" orders? I can't do it easily with the current goxtool as I have to type in USD price and quantity of BTC.

Is there a way for goxtool to:

• Calculate how many BTC given a certain amount of USD using the market price?
  
• Calculate how much USD given a certain amount of BTC using the market price?

Once I have this number I can offset accordingly.