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 and Mr. Excel, the 14th installment in their joint series of digital spreadsheet magic tricks, you'll learn how to create formulas and Conditional Formatting that will display UP, DOWN, and SIDE arrows to indicate up or down for a list of numbers.