You need to base your trades on a carefully prepared trading plan and not jump in response to price changes. I pays to write down your plan. You need to know exactly under what conditions you will enter and exit a trade. Do not make decisions on the spur of the moment, when you are vulnerable to being sucked into the couwd.

You can succeed in trading only when you think and act as an individual. The weakest part of any trading system is the trader himself. Traders fail when they trade without a plan or deviate from their plans. Plans are created by reasoning individuals. Impulsive trades are made by sweaty group members.

– Alexander Elder, Trading for a Living