Fear deprives the trader of the opportunity to earn, forcing him to withdraw from trades and sell positions at too low a price. Fearful investors tend to often anticipate downtrends and therefore are not eager to buy. People who are powered by fear most of their time soon realize that the stock market is not their true purpose and probably not for them.
That is why you should always follow a certain trading strategy. So you will be sure that you are doing everything right, and protecting yourself from spontaneous fear-based decisions.
