I've managed to get this done, the steps are listed below: 1. Open the positions tab 2. Add the position tab to My Workspace 3. Next to the Market text is an icon with three lines, clicking on this opens the menu to set the columns that are displayed 4. Display the book price 5. Edit the book price to get the average price desired, remembering that prices need to be rounded to 1 cent/pence Job done You may need to close and reopen the position tab to have the profit/loss column calculate correctly.