Lack of proper research before trading is one of the reasons that cause bad trading.
Lack of strategy is another reason why most persons have bad trading; when one does not have a strategy to use in trading,it certainly makes him loose,because as the day goes by,so does strategies change in trading.
Lack of experience is also one of the reasons why people have bad trading.When they do not have experience on how trading goes,or how they will trade,it will certainly have an effect on their trading.
Yes, when traders are caring about their capital then definitely they will avoid bad trading. We cannot do anything about the unexpected market fluctuations still we can exit at stoploss level to cut our losses smaller. So, even in the high volatile market, we can trade safely it is is fully up to the traders and their caring about the capital.