Break support at 2,639.75 in s&amp;p500 futures would mean breaching the 61.8% fibonacci retracement line. 

A decline of 67.43% would be the mid point in decline between the 30s and 08. 

2,174 was only 35.93% there. I'm not saying it WILL, I am just afraid it 'may'.

$spx $spy $dia https://t.co/lqAfu6ncYd