People who know how to play mahjong will observe the cards, what they have touched, and what they have done. They will analyze the situation at the moment by looking at the cards played by the three players, and they will choose the strategy that is most beneficial to them. The best result is of course self-drawing. But when this winning card is rare or it is a marginal card, he will also pick up the cannon. If he finds that someone is making a big win, and there is a dangerous card in his hand at this time, he may choose to remove the card and play a safe card. The above are different measures that may be taken in different situations. Different people with different personalities will take different measures when facing the same situation, so there is a difference between conservative and established. Taking different measures in different situations is what is called strategy in trading. Observing the cards and analyzing the cards is technical analysis in trading. The purpose of technical analysis is to let you understand the market and gain an advantage. Those who win mahjong for a long time basically have small losses and big responses. First of all, he tries to ensure that he does not play the cannon. According to the information on the cards, no dangerous cards are played. If other players make their own plans, this is the money to be paid, and there is nothing to say. Because even if you have an advantage, there is still a probability of loss.