Emotion is your one enemy in trading and experience in your way to learn trading if you surpass your emotion and make your own strategy Im your your journey to trading will be success.
Upon reading the article that you mentioned above this is good to know and apply to your trading risks management is important to trading.
Emotions are things that become a major problem when we are going to trade, because when we cannot control emotions we will only be shackled in a very difficult situation. Arrange our emotions as well as possible and do not occasionally make a decision without considering various things to analyze.
If we can defeat emotion, we will be at the forefront of success !!!