This is very cool. Thanks. Some comments:

* as far as I can see there isn't an exchange class. An important and difficult use case is handling N exchanges at the same time. For example say a trader has 1 BTC and wants to exchange for x$, where x = current last price on average over 5 exchanges. Then he wants to issue an order depending on the market rates through an abstractInterface ("routing"). basically the platform provides an abstraction for MTF's. An even more abstract pattern would be routing to exchanges with certain parameters (buy 25% at 4 exchanges each, if they are reliable).

* naming of same packages on this level [1] - what is cryptocoinpartners? what is "module", "bin"?

* I have developed my own semantics which I will publish in 1-2 months. Interoperability will become more important over time. There is certainly a lot to be done in this area, and I'm glad there are these opensource projects. There were are a couple of closed source ones, which misses the point.

* License?

[1]
https://github.com/timolson/cointrader/tree/master/src/main/java/org/cryptocoinpartners