Cumulative Chart with Single Day Selection

[Anonymous]

I am running into some problems with a DAX related, cumulative sum measure. 
Basically I am trying to create a plot which will show a running cumulative total for a selected date range. I currently have it working, as shown in the picture below, where when a user selects multiple days, the chart displays the totals for that date selection. I have removed the name of the Sales table due to privacy concerns, but you can assume its basically "SaleTable", where the sale information is stored.

As you can see in the screenshot, selecting multiple days does the trick. However, ideally Id like to get the same behaviour when selecting a single day from the hierarchical slicer. So if a user just picks the 24th, and no days before that, you would still get the same visual. 
Even more ideally, Id like to be able to show the entire month, with dates after the selected date being blank. So selecting the 24th wont limit the chart to the 24th day, but will show the rest of the days pup until the 31st as blank.
Would really appreciate any help on this!
I feel like a solution might be to use a disjoined copy of the date table, and base it off that. 

[johnt75 · Accepted solution]

SQLBI have a video which I think matches what you are after - https://www.youtube.com/watch?v=d8Rm7dwM6gc 

[Anonymous]

Thank you so much! That definitely took me in the right direction. Really appreciate your help!!