@guytp - your exchange doesn't appear to be executing orders properly right now. I just tried to sell 50 RIC at market, and it's just sitting there, listed as a 50 RIC open order, but nothing's happening.

This was fixed yesterday evening, apologies for the blockage last night.
Do you not allow US residents to sign up?
We do not at the moment. We are looking at how/if we can ensure US compliance before accepting US users.