When speed is of upmost importance to get in/out trades, the worst thing to have as part of the user interface is a "Back" button. The programmers of this app should know exactly what Im talking about. There should be a "Buy More" button across all screens. This includes the Open Positions, Summary, and Closed Positions. All screens and all positions should have a "Buy More" option available. There should be no reason why you have to use a "Back" button to go to the Rates screen to look for the pair and enter a trade. By that time youve probably missed your good entry point opportunity. Therefore, 2 stars. Add the "Buy More" option across all screens, and its a 5 star app.