Hi Community, there is requirement from client where we have to show rolling 4 weeks and previous 4 weeks rolling average and DC column shows %difference value. Kindly let me know any video or link that i should refer for the same

Video's and pages aside @Diksha Joshi​, as Caleb has explained, these are really window calcs. For example:

Window_Avg(Sum(Sales),0,-4)

Will perform a running sum (cumulative) for the last 4 periods in your data.

But in order to perform a difference calc against another period, you'll need to change the summation vectors with a new calc:

(Window_Avg(Sum(Sales),0,-4) - Window_Avg(Sum(Sales),-4,-8)) / Window_Avg(Sum(Sales),-4,-8)

Should do it.

Steve