I would like to do a forecast too. All the forecasting examples that I have read will not work for our retail company. For example, I want to forecast for the month of December 2004. I want to take last year's (December 2003 and divide it by December 2002) minus 1. This will give me the percent growth from December 2002 to December 2003. Then, I will take December 2003 and add the percent growth to arrive at December 2004 forecast. This very simple forecast will reflect seasonality. I am aware of ParallelPeriod, which will look at December 2003 (12 months ago), when I am looking a December 2004. I also need something to look at December 2002 (24 months ago). Then I can create the formula. The formula needs to be dynamic, not lock down on a single month. I will observe all solutions or workarounds? Help will be appreciated much!