Finding delta between certain dates while filtering the dates

[LFM]

I want to find the change of values between dates while filtering between dates on the slicer. F.eks I want to choose the dates 01.02.2024 and 15.02.2024 on the slicer and then see the delta value between those dates.
I have tried the DAX measure shown below, but it will only show values for certain days back in time, and I cannot filter between different dates. 

[v-zhengdxu-msft · Accepted solution]

Hi @LFM 

Please try this:
First of all, I create a set of sample:

Then add a measure:

Diff = 
	VAR _currentDate = CALCULATE(
		MAX('Table'[Date]),
		ALLSELECTED('Table')
	)
	VAR _previousDate = CALCULATE(
		MIN('Table'[Date]),
		ALLSELECTED('Table')
	)
	RETURN
		CALCULATE(
			SUM('Table'[Values]),
			FILTER(
				ALLSELECTED('Table'),
				'Table'[Date] = _currentDate
			)
		) - CALCULATE(
			SUM('Table'[Values]),
			FILTER(
				ALLSELECTED('Table'),
				'Table'[Date] = _previousDate
			)
		)

The result is as follow:

Best Regards

Zhengdong Xu
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