For example, after you bought PetroChina, the price went up and reached your expected target price. Just close the position. After that, the price continues to rise, and you continue to buy. The profit will come out. This keeps coming in and coming to the warehouse.
"Rolling warehouse" operation is generally a technique of main trading. To save money. When the main funds are pushing the price forward, they keep coming to the warehouse and keep entering the market to open positions. On the one hand, this creates an illusion that one party has given up and played. ..... too much money keeps coming in. In fact, his own funds are also going back and forth.