One of the things that you must iron before getting the services of a Forex broker is the the payment scheme. Some Forex brokers are  paid on a commission basis. Then there are those who require a regular fixed pay. Whatever the scheme is, it must first be determined and must be put into writing and the contract must be signed by both parties.

If not, you could have a problem later on when you are already earning a significant amount of money from Forex. You would not want all your earnings from Forex to your broker would you? So iron out payment scheme first before getting a Forex broker.