SPY 60-min displays the 21 sma is a useful inflection level for evaluating the potential staying power of the ups and downs for 6 indices - * the 21,2 Bollinger Band contains the majority of the price action each day SPY and $OEX have not tagged the upper Bollinger Band since the July 18th noon price bar, so the upside momentum is waning , for now a strong uptrend has numerous tags of the upper Bollinger Band https://stockcharts.com/h-sc/ui?s=SPY&p=60&yr=0&mn=0&dy=12&id=p74097723084&a=607239152