Some traders mainly focus on profits, subbing the right ways to escape the calamities of trading. If profit is the only option that motivate a trader, then the trade might likely fall into a massive problem, because he will make decisions that is not in order.
Sure, because they just chase the profit since that is what makes them become a trader, and if you're someone that always chases profits, you will never focus on your plan anymore. You don't have a good strategy, and that is what makes you lose time to time. Any trader loses, but people that survive most are those that always use risk management, and even if they lose, they accept the loss as a cost, not those who chase their money. And traders that think about profit all the time panic when they don't get it right, and they will start to change strategy every time just to get what they need without getting a proper planning, and never get consistent.
