你買賣美金,佢俾你keep track住賺蝕
想delete佢要去desktop TWS
< Try doing it from the Account module/page (main application menu --> Account --> Account Window). You should see the "FX Portfolio - Virtual FX Position" section near the bottom. Right click the virtual FX Position and menu should appear with approximately ten items in it. Select the "Adjust Position or Average Price" menu item. >