FXCast states on its ABOUT page that it "...operates under the international regulations of the government of Antigua and Barbuda." Antigua & Barbuda is a member of the Caribbean Community (Caricom) and the Organisation of Eastern Caribbean States (OECS). The regional Eastern Caribbean Central Bank is responsible for regulating the availability of money and credit, maintaining monetary stability, maintaining a common pool of foreign exchange reserves and issuing a single common currency for eight of the nine OECS members. FXCast should fall under their regulatory authority.
I visited Antigua recently and tried to visit the FXCast offices at 241A Peninsula Drive in Jolly Harbour. I couldn't find Peninsula Drive anywhere in Jolly Harbour but I did find 241A Jolly Harbour Drive. It was an empty villa for rent. Maybe just a coincidence. I sent FXCast an email asking about their office location and they responded that, in the summer, the FXCast staff is either in St. Johns or in Europe.
Go figure.