Some popular features

Here are some of the more popular features fork of your Bitstamp gem have used.

The vwap fix is mandatory if you wish your gem to remain operational. I am not sure how, but likely you will want to doing something to not feed all kinds of stuff into active model so this won't break every time Bitstamp adds forward compatible changes to their API. If I come up with something I'll send another pull request.

You might want take a look at your forks, someone added some kind of Euro to USD conversion and someone else is doing something with a REST API I do not fully understand.