We need to display graphs which are rolling-13 weeks. We have been able to get the week numbers to roll. The data is on the same sheet on the left hand side - columns BI to DH). The charts' source data that we are going to make flexible (13-wk rolling) is towards the right end of the sheet (cols GA to GM). How do we get the values from the left side to this chart area (GA to GM) in such a way that when the week number on the top changes, the data should change below to point to the correct week?