The summary window shows your net positions. It combines all the trades you have open for one currency pair and nets them together. So if you open three 10K buy positions for the EUR/USD the summary window will show one entry as 30K long on the EUR/USD. You will also see the average sell and the average buy for that particular currency pair. This is the average price that you entered the market for all of the trades for that particular currency pair. The summary window also shows things such as your net profit and loss the net stops, and the net limits you may have on your trades.