I feel that the most reasonable capital that you can exchange with forex is $ 1000. This is the best way to trade without feeling scared because you can risk 5% of your account and still make a good daily profit from your trading. If you use something that is lacking, you might be tempted to take a higher risk. And for me $ 10 is not bad as a cent account and as a start because if you lose then it won't go in large amounts but I think we should need a cent account for that. but we also need to trade with low lot sizes because if we use high lots it will disappear in a very short time.