Comparing value to previous Column in matrix

[VDebande]

Dear all, 

I have a matrix that allows me to see the evolution of sales for my products over time. 

I would like to highlight the value when it's X% greater or lower than the value of the week before (or, in next step, the mean of the sales for all weeks ?). 

See the first matrix as the data I have in Power BI. 

The second would be the difference with the week before. 

How could I achieve this ? 

Thanks a lot !

[v-cgao-msft · Accepted solution]

Hi @VDebande ,

Please try:

Diff =
IF (
    SELECTEDVALUE ( 'Date'[Week] ) = 1,
    0,
    [YourMeasure]
        - CALCULATE (
            [Total Profit],
            'Date'[Week]
                = SELECTEDVALUE ( 'Date'[Week] ) - 1
        )
)

Diff% = 
VAR _cur_week = [Total Profit]
VAR _pre_week = CALCULATE([YourMeasure],'Date'[Week]=SELECTEDVALUE('Date'[Week])-1)
VAR _diff_rate = ABS(IF(SELECTEDVALUE('Date'[Week])=1,0, DIVIDE(_cur_week-_pre_week,_pre_week)))
VAR _result = IF(_cur_week>=_pre_week,_diff_rate,-_diff_rate)
RETURN
_result

Next, you can set the conditional format according to your needs.

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

How to get your questions answered quickly --  How to provide sample data in the Power BI Forum -- China Power BI User Group

[Ritaf1983]

Hi @VDebande 

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

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