For backtesting or other reporting, a report sheet stipulating monthly %returns, win rate and profit factor of the system. So 2015 Jan:5% 2015 Feb:8% 2015 March: -2% and so forth. Ideally, it would also show one for the overall year.
You can generate a monthly return chart with plotMonthProfit - look in http://manual.zorro-project.com/profile.htm. For adding it to the performance report, you must program it in the script.