On the surface, the formation of a triangle means that the amplitude of the stock is getting smaller and smaller, for example, from the original 15% to 10% to 5% to 3%. In the end, the stock basically did not rise or fall, and the trading volume gradually shrank, that is, the bulls and bears did not exert their strength and were in a balanced state. This is a typical turning point. If it suddenly rises, and it is accompanied by the enlargement of trading volume, then the market outlook is bullish, with a large range; If there is no amplification of trading volume, this pattern is doubtful and should not be followed up. If it starts to fall, it doesn't need to cooperate with the volume, and its downward trend is established, so it is appropriate to lighten up the position and wait and see.