Key points for entering a buy position (the same applies for selling):

1. Understand the level, this is fundamental, for example, when buying on the 30F level, enter at a lower level.

2. Key points for entering a buy position on the 5F lower level: only enter if there is a bullish emergence on the 1F, exit if there is no bullish emergence on the 5F. Otherwise, wait for the second buy on the 5F.

3. Key points for the second buy on the 5F lower level: both above and below the water can be entered.

4. Important: If there is no bullish emergence on a single transaction on the 30F, you must exit. Then wait for the second buy on the 30F or a new first buy.