Display data in excel Cell for a tag only if value changed

Hi,

Lets say I have tag called XYZ_1. if I do archive value for it for yesterday it.

and if I do 30 second interval.  it will mostly have value of "Good". Is there a way PI can do this type of calculation for me if value changes then display count of number of times value changed with in that 24 hr peroid or given time period?

Good

Good

Good

Bad

Good

the result would be 1 or 2 depends on how we look at it.

hope my question makes sense.

Thanks