The Average of past 6 months is a manual procedure For example : How to calculate the average of past 6 months of February 2012 (Unique Visitors)? Go to the Unique visitors Table / 2012 february average of past 6 months cell and type “=(sum)” and then select, 2012 statistics of the 6 past months (including february 2012) 02.2012(4736) - 01.2012 (6326) - 12.2011 (5148) - 11.2011 (5454) - 10.2011 (5267) - 09.2011 (5059) And divide per 6 to have the average. Result = 5331,67 lundi 16 avril 2012