From time to time the Forex brokers use special drawings to promote their services and to provide some form of addition reward for their loyal traders. Drawings are usually random and the winners are determined based either on the account number or some trading transaction number. The bonuses of this type usually require some trading activity from the trader prior to participation in the drawing. These bonuses are kind of lotteries with the higher chance of winning and almost no cost of ticket because the «entry ticket» is paid by the fact that you are already trading with the given Forex broker. Drawings are a nice addition to the broker but they rarely serve as some major factor for the experienced traders. It's nice to win but it can't be relied upon.