My worst case scenario would be $5,338. I calculate two ways. Take high of $9,177.5 and low of $8271.1. Extension 1.618 of $7,710 did well. Extension of 2.618 of $6,804 did well too. Next extension of 4.326 is $5,338. Of course anything can happen to stop the price going lower in between. There is also one of my Bollinger arrow marks around the lowest level made around February low which could also give that worst case scenario some support.