Chris Vermeulen: Emotions and Lifecycle Analysis.

+1: History has an uncanny ability to repeat itself. Whether it's the rise and fall of an empire or the rise and fall of a stock, there are clear cycles that are prevalent throughout history.

People may change, but human nature, and our ability to act, react and overreact is simply an innate part of our being. This predictability is what forms the basis of technical analysis and provides a trader with an edge with which to trade upon. When we are analyzing cycles we really are analyzing emotions, trying to gain insight as to how market participants are behaving.

John Maynard Keynes is often quoted for suggesting that "The markets can remain irrational longer than you can stay solvent." This is a harsh reality and puts great emphasis on the importance of discipline, risk management, and a keen eye for price action.

Emotions are what separate the successful traders from those that lose money. They can be regarded as a relentless opponent, often showing up without warnings and striking you at inopportune times. The successful trader is able to recognize their presence and maintain objectivity, constantly assessing their own strengths and weaknesses.
There will ultimately be times where you can't control your emotions; however you can always control how you respond to them. Any time you recognize that your emotions are influencing your outlook you are already one step ahead of the average market participant. It is at this point that you step back, refocus your perceptions, examine the price action, and then take the appropriate action.
An understanding of herd or mob mentality is important in trading and can provide you with an edge over the average participant who doesn't contemplate what is happening around them. In a mob or riot, we never know what the feelings and motivations are of all the individual participants.
There are however certain emotions that seem to appear at distinct times and a certain predictability in their development. A stock's price action is no different. While we never know the underlying feeling and motivations of all participants, there are distinct emotions that are shared by the herd at various stages of a stock's life. An understanding of these emotions and their implications on the price action of a stock is an advantage that the profitable trader maintains.