Does anyone know how much you need to deposit to operate with a prime broker in Forex such as Citi, JPM or Deutsche Bank?Does the monthly volume play an important role to obtain an account?What kind of margins do they offer?What is the minimum margin necessary to operate greater or minor fx pairs?What leverage can be obtained with the 10 main banks in the Forex Spot trading?If you become too big for a retail broker, what are your best options between retailers and big banks?