If having done a little research I have found that if this is to be a Stair & Elevator Pattern which in turn would be bullish? The bottom would have to come in around $428 ~ $418. Now to be perfect it has been said the retrace from X to Z would have to be 90% from the 09/04/2016 low which would be Y and a price around $418. If anybody would like to shed any further light it would appreciated as these beasts seem to be quite rare patterns!