if some forex brokers call you home by phone promising you hyperbolic returns if you sign up with them....here is the site to control what kind of experience you are entering
www.scamforex.net
Most of these ''forex brokers'' calling people home, here in Europe, are pure scam. You give them your money or part of it and you say goodbye to it.
I could give you tons of names. This site helps to stay away, but these scam brokers are a lot more than this site reports, so keep your eyes wide open