Auto Update Comparing Revenue # of Days Out from Performance

Hi Everyone,

I want to create a "123 Indicator" that shows ticket sales x # of days prior to the performance so we have a quick numeric visual. 

I was able to pull this information by using Price Type Group, Production Season, and then Order Days Prior to Performance  "All items equal or smaller than -87."

Is there a way to set this up so it automatically updates and I do not have to go in and enter -86, -85, etc every day? 

Thanks,

Nicole