Hello everyone, I would like to ask you how to become a stable profit trader, what aspects should be learned from it, I have read some books, such as price behavior, but still at a loss in the real market

There are several factors that are critical, the first one is to not accept anything that you read at face value, there are an almost unlimited amount of systems out there when it comes to profit from the markets, and the only way to make sure the one you are using works is to test it, so take pen and paper and paper trade that strategy and if it does not work then you need to discard it, another factor that is often disregarded is your own state of mind, since it does not matter how effective your strategy could be, if you get cold feet and you do not use it when you have to.
The right time to buy and the right time to sell, it is one of those many factors that you need to consider, there are trading sessions that you may win your position while there are also situation where you might lose your money, keep on learning and in every chance that you need to adjust better to work on it to avoid losing more but instead with your past experienced you might anticipate where the market is heading and you may have that chance to position.
Just keep in mind that trading is a never ending cycle that you need to consider while analyzing each position that you'll going to take.