Based on that measure I can calculate the difference between stocks in the consecutive days (measure):
Change = sum('data'[stock]) - 'data'[PrevStock]
Then I want to display data for a particular month, say February. The problem I am facing is that on 1st Feb "Change" shows a number which is equal to stock amount. I guess when I limit date range it cannot see any previous data so it thinks that "PrevStock" is 0.