Identify if value has changed over time with same ID

Hi dswallow 

Thanks for reaching out to us.

You can try this, create the column below

Milestone changed and value = 
var _maxdate= CALCULATE(MAX('Table'[Date]),FILTER(ALL('Table'),'Table'[ID]=EARLIER('Table'[ID])))
var _predate= CALCULATE(MAX('Table'[Date]),FILTER(ALL('Table'), 'Table'[Date]<_maxdate && 'Table'[ID]=EARLIER('Table'[ID])))
var _cur='Table'[Milestone]
var _pre= CALCULATE(MAX('Table'[Milestone]),FILTER(ALL('Table'),'Table'[ID]=EARLIER('Table'[ID]) && 'Table'[Date]= _predate))
return IF('Table'[Date]=_maxdate,IF(_cur=_pre,"No change", "Changed, pre="&_pre&", cur="& _cur))

result

Best Regards,

Community Support Team _Tang

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