Impermanence Principle

The Market will rise in fear and fall in stability. Be pessimistic after a period of bull market; be optimistic after a period of bear market.

Always remember to set Stop Loss. Self-discipline is paramount. Never break the new low consider as double bottom, otherwise you will always in fear and can't make money in next spring.

Buy close to the lowest point and sell close to the highest point.

Those who know to buy a stock are apprentices; and those who know to sell are Masters.