Forum Discussion
4 week rolling average
jnrezk , Create a date table or week table with rank on week start date
new columns
Week Start date = 'Date'[Date]+-1*WEEKDAY('Date'[Date],2)+1
Week End date = 'Date'[Date]+ 7-1*WEEKDAY('Date'[Date],2)
Week Rank = RANKX(all('Date'),'Date'[Week Start date],,ASC,Dense)
OR
Week Rank = RANKX(all('Date'),'Date'[Year Week],,ASC,Dense) //YYYYWW format
Then try measures like
Last 4 weeks = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Week Rank]>=max('Date'[Week Rank])-5 && 'Date'[Week Rank]<=max('Date'[Week Rank]) -1 ))
Power BI — Week on Week and WTD
https://medium.com/@amitchandak.1978/power-bi-wtd-questions-time-intelligence-4-5-98c30fab69d3
https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-Last-Week/ba-p/1051123
https://www.youtube.com/watch?v=pnAesWxYgJ8
amitchandak Thanks for this. I have created a few new columns to calendar including Week Year and Last 4 Weeks as you said - the numbers don't seem to be correct ... i attached an example and hoped you could please alter it or let me know what I did wrong? Thanks!!https://drive.google.com/file/d/1pFO1IL-Pt9UWqlvd5j2qmLuNW4Q-Vzlz/view?usp=sharing
jnrezk , You need to create measures for rolling
Avg = CALCULATE(AverageX(values('Date'[Week Rank]), calculate(sum('Table'[Qty])) ), FILTER(ALL('Date'),'Date'[Week Rank]>=max('Date'[Week Rank])-5 && 'Date'[Week Rank]<=max('Date'[Week Rank]) -1 ))
a new column will be like
CALCULATE(sum('Table'[Qty]), FILTER(('Table'),'Table'[Week Rank]>=earlier('Table'[Week Rank])-5 && 'Table'[Week Rank]<=earlier('Table'[Week Rank]) -1 ))
amitchandak This is what I already did - can you check my file I linked and let me know what adjustments I should make?
