A trader has to win or his losses will make him give up on himself. A trader that isn't winning would not have the motivation to continue trading. The wins mightn't happen everything but it should be more than the losses that he experiences so he can have a profitable balance sheet.
There will always be profitable trades and losses in trading, this is normal, the most important thing is that there are much more profitable trades. A trader should be able to develop a list of rules for himself over time, which he must adhere to, if he violates them, then losses will happen more and more often. Everything seems simple, but disciplined to follow all the rules is not so easy, so the majority loses in the market.