the 4H Average True Range (ATR) of the S&amp;P 500 $spx  since Dec 2019 - it's falling because price has been reverting to the mean (μ) 2788.5 of the ATH 3398 to swing low 2179. another bounce would imply one more significant leg down in price in the relatively near future https://t.co/58nDL4fFbw