forget it bro - such 'indicator' will never work lol... in order to estimate how deep a retrace will be, you simply need to look at the dumb money positions, and what narratives are being pushed.
based on my estimation, following the retail positions for the past few years.... for the foreseeable future we can expect 5% corrections from time to time.
retail is still quite short... tons of sideline cash, there will be very slim chance any retrace can reach 10%.
on the other hand the 'shortness' is not as extreme as it was in 2017, so we'll not get a silky smooth ride either.
for the long term who cares about 5%... Warren says stocks are ridiculously cheap... and Fed is already committed to being dovish, so I'd say just load it up.