Hello again @Peter_Schindler, Now that I’m no longer a brand-new user, the forum will let me post the screenshot mentioned above.

Hi @Peter_Schindler, Here’s a possibility: Add a field that links each date to the previous dateAdd a lookup field for the previous date’s visitsAdd a formula field: IF({Previous Visits}, ({Visits} - {Previous Visits}) / {Previous Visits}, 0) I trie...