The change of the contract volume will have an impact on the futures price, and the change of the futures price will also cause the change of the trading volume and positions. Therefore, analyzing the changes of the three is conducive to correctly predicting the trend of futures prices.

1. The volume of transactions and open contracts has increased, and the price has risen, indicating that new buyers are making a large number of acquisitions, and the price may continue to rise in the near future.

2. The volume of transactions and open contracts has decreased, and the price has risen, indicating that a large number of short positions have been closed, and the price will go up in the short term, but it may fall back soon.

3. With the increase of trading volume, the price rises, but the amount of open contracts decreases, indicating that both short sellers and short sellers are closing their positions in large quantities, and the price will fall immediately.