I don't think my previous comment will come to be. SPX chart below has the green a x 1.618 = 4267 target for c (the red horizontal line) and is below the August high and NDX is so far below August high I don't think it's likely http://stockcharts.com/c-sc/sc?s=%24SPX&p=60&st=2020-03-02&i=p83457194222&a=256257406&r=1669655771355&r=1669656026017