It's true that most traders don't get success in forex. The reason is their trading decisions are not based on sound research and learning. They think forex is a cash machine. You trade and procure immense cash. They don't consider it as a business.
most of the traders don't get success because one, they are heavily impatient and second, they do not understand the mathematics that governs the market. most of the traders think that they can utilise leverage, margin trading and futures trading to earn money ht the truth is, more than 70% of such traders fail. traders also fail because they are involved with the wrong broker.