New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 584th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the OFFSET function and defined names to create dynamic ranges for formulas so formulas update each period when a new data dump (copy and paste) is completed.