1. When the middle and lower rails of the Bollinger Band move upward at the same time, it shows that the strong characteristics of the original oil price are very obvious, and the original oil price will continue to rise in the short term. At this time, it is necessary to hold the order and wait for the rise or buy on dips.

2. When the upper and lower rails of the Bollinger Band run downward at the same time, it shows that the weak characteristics of crude oil are very obvious, and the price of crude oil will continue to fall in the short term. At this time, you should wait and see or sell on rallies.

3. When the upper rail of the Bollinger Band runs downward, while the middle rail and the lower rail are still running upward, it shows that the stock price is in a consolidation trend. If the crude oil price is in a long-term upward trend, it means that the crude oil price is a strong consolidation on the way up, and it should wait and see or buy short-term on dips; If the price of crude oil is in a long-term downward trend, it shows that the price of crude oil is a weak consolidation on the way down. At this time, we should wait and see or lighten up on rallies.