Magic SKEW-50day SMA

I made SKEW invisible on this chart; only plotted 50-day SMA of the SKEW for clarity

When SKEW-50day SMA was above 130; huge left tail risk warnings

Before Feb 2018 #Volmageddon
before Oct-Dec 2018 $SPX carnage
before Feb/Mar 2020 Virus crisis

obvious?🧐 https://t.co/JjDEMhXViS