Levente

Hy! I'm looking for a solution for this problem: I've stored all of our assets warranty end date in a SYSTEM custom field called WARRANTY. Then I've created two other GLOBAL custom field. One called TODAY the other is TODAY30 and they are daily updated with the current date and current date + 1 month. How can I set a condition in workflow that checks if WARRANTY is between these two dates? Currently I can only set static dates: Thanks in advance for your answers!