Rolling forecast headers provide users with headers that dynamically span columns based on the period and report date. This feature is great for rolling forecasts, where some columns contain Actual data, and some columns contain budget/forecast data. Each month, as the report date is changed, the headers will update also which reduces the maintenance and user error involved with creating and generating rolling forecast reports.

http://www.youtube.com/watch?v=sJ8A2MzZqrc&list=PLBE027591B1C070D6&index=1&feature=plpp_video