Find value of Previous Row in same column (Weighted Rolling Average (Future Outlook with Percents)

[Brechtzi]

Hello,

I am looking to make a rolling weighted avg in Dax. The calculation will always start with today and if before just 0. If today it will be column c. Otherwise the calculation as shown will depend on the average from the day before combined with the average of what came in today.

Column H = IF(A9=I$1,C9,H8*E9+D9*C9)) Is the Excel formula

[v-xiaotang]

Hi @Brechtzi 

You need to use Power Query to calculate that, and please read this article, it will help you

https://community.powerbi.com/t5/Community-Blog/Exponential-Moving-Average-in-Power-Query-EMA/ba-p/1...

Best Regards,

Community Support Team _Tang

If this post helps, please consider Accept it as the solution to help the other members find it more quickly.

[Brechtzi]

Date           Index  

3/11/2022	7	3.879786037	0	1	3.879786037
3/12/2022	8	1	0.065860096	0.934139904	3.690123052
3/13/2022	9	1.928234957	0.090937299	0.909062701	3.529901708
3/14/2022	10	1.131091788	0.105356317	0.894643683	3.277171929
3/15/2022	11	1	0.017880541	0.982119459	3.236454863
3/16/2022	12	2.466016437	0.065829139	0.934170861	3.185737565
3/17/2022	13	1.312716137	0.212616249	0.787383751	2.787502775
3/18/2022	14	1.963932505	0.199346254	0.800653746	2.623327127
3/19/2022	15	1.72541476	0.134571979	0.865428021	2.502493282
3/20/2022	16	1.439589484	0.093264944	0.906735056	2.403361619
3/21/2022	17	1.082738258	0.164906848	0.835093152	2.185581783
3/22/2022	18	6	0.161192881	0.838807119	2.800438845

[lbendlin]

Please provide sanitized sample data that fully covers your issue. If you paste the data into a table in your post or use one of the file services it will be easier to work with. Avoid posting screenshots of your source data if possible.

Please show the expected outcome based on the sample data you provided. Screenshots of the expected outcome are ok.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523