The main advantage of the Forex trading contest is the gains and the prizes that are being offered and thus their are chances of making the real profits. Most of the times when the trader actually take part in these contests then he would be able to make some learnings based on his activity and thus would be able to improve his trading skills also. well no bro most of the broker prizes cannot be withdrawn only profits made on it can be withdrawn..so i dont see any disadvantages in it...well even our indian forex should start contests because in mt5 forum there are too many traders are there and it is very difficult to win..