Measure If Date Less than Another Date

Dear gauravnarchal .
This measure will do the work 

Hi gauravnarchal ,

According to my understanding, you want to create a True/False flag when the date is within/not within 90 days(Comparing with the last day in the Created_at column), right?

You could use the following formula:

_diff =
IF (
    DATEDIFF (
        SELECTEDVALUE ( 'diff'[Created_at] ),
        CALCULATE ( MAX ( 'diff'[Created_at] ), ALL ( diff ) ),
        DAY
    ) <= 90,
    TRUE (),
    FALSE ()
)

My visualization looks like this:

Is the result what you want? If not, please upload some data samples and expected output.

Please do mask sensitive data before uploading.

Best Regards,

Eyelyn Qin

gauravnarchal  ,
Please let me know that did you got your answer which i mentioned earlist of all .
which was