The lock function only exists in investments that can be traded in two directions, and is usually used to hedge open positions. If you don't click the lock order to hedge, you can directly place a reverse order in the same currency group on the opened position, which will result in a relative write-off with the original position. For example, if you open another EUR/USD selling position, the related position will be automatically reversed.

Operation mode:

There are two ways to lock the order: right-click on the chart to lock the order, and select buy or sell, and then check the lock option in the pop-up window. If the lock option is not selected, the two-way parts of the same currency group will cancel each other out.

Or right-click the opened position and click "Hedge Position" in the pop-up message window. If you have multiple open positions, you can set all or fewer locked positions at once, just enter the number of positions to be locked in the "Lock List" window that pops up.

Try not to use this method if it is not necessary. Don't hesitate to stop loss, it is the best way to avoid heavy losses. It is easier to lock the bill than to unlock it. Understand this sentence.