Date-Range Slicer: Dynamically Change Data Aggregation on Chart based on selected date range

Make sure you have date calendar.

To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s.

Refer
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions

The in your formula has a variable

var _diff = datediff(minx(date,date[date]),maxx(date,date[date]),DAY)

Based on this drive rest of the formula.

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