Yep.
Start by adding a random DATE field to your table that you want to update the equation on.
If you are using a form to add / delete the document:
Add a From Rule > record rule
Action = Update Connected Records
Set = RandomDate to “CurrentDate”
This will update the RandomDate field which will force an update to that one particular record, which will update the equation.
Another way of doing it is to setup a daily “task” within the table, to update the RandomDate field to that days date. Then it will update ALL the records within the table.
If you are using a action link, you should be able to do the same.
Hope that helps.