There are two kinds of lock positions, one is profit lock position and the other is loss lock position.
Profit lock-in: Profit lock-in means that futures contracts bought and sold by investors have a certain floating profit. Investors feel that the original general trend has not changed, but the market may fall back or rebound briefly. Investors don't want to close the original low-priced orders or high-priced orders easily, so they continue to hold the original positions and open new positions in the opposite direction.
Loss lock-in: Loss lock-in refers to a certain degree of floating losses in futures contracts bought and sold by investors. Investors can't see the market outlook clearly, but they don't want to turn the floating losses into actual losses, so they continue to hold the original loss positions and open new positions in reverse in an attempt to lock in risks.