I just noticed that they don't actually provide an order book or any sort of bid-ask spread information. That makes price discovery extremely challenging, and makes this even more difficult for providers of liquidity (traders, dealers, etc.). Charitably, I assume this is coming and they haven't had time to implement it yet.
Oh, I see. I didn't realize those line-items were clickable. For the interface of the order book you should really check out how it's displayed on a trading system or something (with bids and asks in separate columns), although it's impossible for me to know how your system would look with more orders attached.
