Overnight (beginning of AH) high print 1576.00, recent low 1556.75, difference roughly rule of 10 X 2, 20 pts
on big plunge day, Thurs 10/11, had roughly 20 pts down in the first leg, roughly 10 pt rebound, then roughly 20 points down to print low of 1556.25
Symmetry of the 24hr charts...