Picking Your First Broker

It's your money, but sometimes it's hard to get it out of your account. That's because brokers sometimes charge fees to make a withdrawal, or they won't let you take any money out if it will drop your balance below the minimum. Some accounts allow you to write checks from them, but those typically require a much higher minimum balance. Make sure that you understand the rules involved in removing money from an account with your prospective broker.
Source: http://www.investopedia.com/articles/younginvestors/06/firstbroker.asp