In Futures trading how is investor deal amount calculated?

We calculate the ratio of the order to the existing position when closing or decreasing the position. The direction (long or short) is not changed.

 We calculate the ratio of the order to the balance when opening or increasing the position. The direction (long or short) is not changed.

If the position direction changes (from long to short or vice versa), then the position is closed and the remaining order amount is calculated based on its ratio to the balance. This will be two separate operations in the Signals History.