In trading, even experts and professional traders still face losses in some of their trades but a professional trader is not someone that doesn't lose a trade but is someone that has a good risk management plan, someone that doesn't allow their losses to outweigh their profit, someone that still remains in profit deposit their losses, someone that can control their emotions while trading, that's what a professional trader entails. Another thing is that, a professional trader doesn't trade in a random manner, they have an well organized trading plans and strategy that they work with and they are also well disciplined. Lastly, they always make profit. That's my opinion.