New to Excel? Looking for a tip? How about a tip so mind-blowingly advanced as to qualify as a magic trick? You're in luck. In this two-part Excel tutorial from ExcelIsFun, the 564th installment in their series of Excel magic tricks, you'll learn how to create a cell chart using conditional formatting with Logical TRUE FALSE formulas to create a Gantt Chart. Functions used include WORKDAY, AND, NOT, NETWORKDAY.