If a person puts his/her money in the stock market. He/she must understand the terrible feeling when seeing stock prices going up and down wildly. 
It is challenging to stay mentally steady when the stock market is wavering. 
But there are a group of investors who built differently. They can resist extreme stress and work like nothing is happening to them. No matter what's happening in the outside world, they stay calm and keep trading.
Sometimes, reacting quickly t...