There is no limit to the possibility of earning from the forex market. As much as a trader is smart and adaptable to changing scenario so much profit can be made. Having said that, I also wish to add that too much greediness will result in substantial loss. A trader should have a clear objective. As soon as the objective for the day is met, it is better to wind up. Getting obsessed with trading will result in a loss as clarity of thought will be lose in the long run.