An ocean can be useful – you can fish in it and use its surface to get to other islands. An ocean can be dangerous – you can drown in it. The more rational your approach, the more likely you are to get what you want. When you act out your emotions, you cannot focus on the reality of the ocean.

A trader has to study trends and reversals in the market the way a sailor studies the ocean. He must trade on a small scale while learning to handle himself in the market. You can never control the market but you can learn to control yourself.

A beginner who has a string of profitable trades often feels he can walk on water. He starts taking wild risks and blows up his account. On the other hand, an amateur who takes several losses in a row often feels so demoralized that he cannot place an order even when his system gives him a strong signal to buy or sell. If trading makes you feel elated or frightened, you cannot fully use your intellect. When joy sweeps you off your feet, you will make irrational trades and lose. When fear grips you, you’ll miss profitable trades.

A professional trader uses his head and stays calm. Only amateurs become excited or depressed because of their trades. Emotional reactions are a luxury that you cannot afford in the markets.

by Dr. Alexander Elder, excerpt from his book, Trading for a Living.