2. In an upward trend, the stock price rises with increasing trading volume, breaking through the previous peak and reaching a new high before continuing to rise. However, the trading volume level of the rising stock price in this trend is lower than that of the previous trend. If the stock price breaks through a new high but the trading volume does not reach a new high, then the stock price rise in this trend is suspicious and may be a potential reversal signal.

3. The stock price rises as the trading volume decreases, and when the stock price rises, the trading volume gradually shrinks. Trading volume is the driving force behind stock price increases, and insufficient driving force is a potential reversal signal.

5. After a long-term decline formed a bottom, the stock price rebounded, but the trading volume did not increase due to the rise in the stock price. The stock price lacked momentum to rise, and then fell again to near or above the previous bottom. When the trading volume of the second trough is lower than that of the first trough, it is a signal that the stock price is rising.

6. The stock price falls below the trend line or moving average of the stock price form, and there is a significant trading volume at the same time. This is a signal of a stock price decline, indicating a trend reversal and the formation of a bearish market.

7. After a considerable period of decline in stock price, panic selling occurs. With the increasing trading volume, the stock price drops sharply. After the panic selling, the expected stock price may rise, and the low price created by the panic selling is unlikely to fall below in a very short period of time. A large number of panic selling often indicates the end of a bearish market.

9. The transaction volume serves as a confirmation of price form. Without the confirmation of transaction volume, the price form is virtual and its reliability is also lower.