Running total using start and end dates with no date table

Hi

I have data that includes an "Activation Date" column and a "Cancellation Date" column. I want a line graph with date on the x axis, showing the total on any given date.

I have done this on another .pbix by creating an "All" table and a "Cancelled" table, subtracting the Cancelled from the All and creating a date table to link them together:

Running Total = (CALCULATE(DISTINCTCOUNT('All'[Item]), FILTER(ALL('Date'[Date]), 'Date'[Date]<=MAX('Date'[Date]))))-(CALCULATE(CALCULATE(DISTINCTCOUNT('Closed'[Item]), FILTER(ALL('Date'[Date]),'Date'[Date]<=MAX('Date'[Date]))))

However, this time I am using Direct Query and cannot create a Date Table.

Is there a way to create an equivalent measure without one?

Thanks!