Traders are directly responsible for their development in forex. How much to earn is directly dependent on trader as it is directly proportional to the amount you are willing to invest. It is totally your preference if you want to play in the safe commodities or the risky ones, when to sell and when to buy etc. Trading system selected by you chose various set of rules related to entry- exit, risk handling and other set of required rules. Never opt for any complicated trading system as it will turn the entire trading into a complicated one rather then fun.