I guess forex trading is a professional market where the failure ratio is more than 90 % and i guess many traders fails due to lack of patience, knowledge and consistency.
Keep spirit in learning, although might not every trader will being success, but if we always serirouslt in learning hence we will get better result I think.Dont know about the percentage of failure but ti is true that many people do loose in the market, but if you spend some time in the market then you can earn some money.