Measure formula to count upcoming days

[cgfrank]

Hello there. I found a measure formula to display only dates before today. Is there a way to count only dates occurring in the next 30 days? The first formula was added a measure to a visualization so i suspect I would need to add another measure to the same visualization to show the next 30 days. The end goal is to show (on a donut chart) items that are currently valid (the dates are later than today), expired (before today), and expiring in the next 30 days (today plus the next 30 days).

Thanks in advance.