SPY 21-day SMA has not been not violated since early July, which means the 21-day SMA will be instructive during future price declines when they occur * ditto 50-day EMA daily SPY - http://stockcharts.com/c-sc/sc?s=SPY&p=D&yr=0&mn=7&dy=0&i=p50167057108&a=702407785&r=1596941621860