To close a position means to remove the initial exposure and make do with the results yielded during the holding period - whether these results are profit or a reduced exposure. A trader would typically want to exit an open position for one of the following reasons:
to exit is the only appropriate way to meet the margin requirements
the targeted profit has been acheived
the loss level has reached the limit
market conditions has changed
To close your position, select Close Position and review the final values.
The formula reflecting the Expected Close Price is simple: it is the Market Price of the asset minus the price impact produces by the trade. Hope you have a good profit on closing.