The last time $SPX finished a day nearly 20% down from its 30-day SMA was Thurs 10/9/08. The next day, Fri, finished with a tremendous doji. - closed 3 points off the open despite a 96-point range (the range was over 10.5% off the closing price). The next Mon, $SPX rallied 11.5% https://t.co/cuk5Mb5OYg