This is really how trade works because no one knows what will happen on every trade you will do that's why there is a stop loss to prevent losing more from your capital and find another good opportunity for the next trade.
It is why traders should use
One of the Best Weapons in TradingAlways think that there is no guarantee of success in trading, even what strategies you will use, you can still lose.
Trading is playing against the market, other traders and biggest enemy, with yourself. If you can not beat yourself in emotion controlling, you will lose in trading.
But if you do good practice or train your self, master things that will help to increase your chances of success, it will help to become profitable.
I think if a trader loses enough, he can think to change to an investor. Only return to trading if he get good profit from investment and cover his previous loss from trading.