Some traders lose money, some break even and some consistently profit. The psychological aspect of trading is so critical that we made it our main focus as we teach. Knowledge and depth in understanding the processes behind market moves and behavior of market participants is what will make you profitable and successful in trading business. Again, this is not definable. Each individual will have a different learning curve.
Trading is a process of learning of how to find and exploit inefficiencies in the market.
You must learn how to lose, before you can win. This is the error that keeps most away from success. Extreme dedication, constant interest in learning, and preservation of your capital as you learn will serve you best. The bull market we had recently, the most powerful ever, fooled a lot of people into thinking trading is easy. The trick here is to be honest with yourself.