1. Single entry point, single exit point: Only single entry point and single exit point mean that traders establish full positions at one price and then close their positions at one price.

2. Single entry point and multiple exit points: It means that the trader also established a full position at one price, but finally closed the position in batches at different prices. This strategy is usually used to seize breakthroughs or trends for as long as possible while constantly cashing in profits.

3. Multi-entry and single-exit points: refers to traders opening positions in batches at different prices and finally closing positions at one price. This strategy is mainly adopted by "downward spread" and "upward spread" traders. "Downward spread" refers to adding positions when the price moves in the opposite direction, but it is possible to get a better average admission price. "Upward spread" refers to adding positions when the price moves in the expected direction.

4. Multi-entry and multi-exit: refers to traders entering and leaving in batches. This strategy is often adopted by trend traders. They open positions "evenly" by adding positions on successful transactions, and then close positions in batches to profit from the trend as much as possible.