https://c.stockcharts.com/c-sc/sc?s=%21GT20SPX&p=D&yr=0&mn=5&dy=0&i=p16189262697&a=607251685&r=1579282653273 Percentage of index or sector components above the 20-day EMA improving percentage for the influential market cap size sectors is supporting the price advance by $SPX ... bulls need this support to continue