In Europe, Brokers need to publish the results. Between 70 and 85% (depending on the broker) account loose money. It’s even more for traders, as successfull traders open accounts at different brokerage companies, and they keep their account open for years, whereas loosers will not stay very long. So there is a constant flow of beginners. So at the end, it’s likely much less than 5% of retail traders who are winning IMHO.