The key level that will say "Sell the US market"

Indices covered:
S&P500

Companies Covered:
QBE Insurance Group Ltd             (ASX:QBE)
Domino's Pizza Enterprises Ltd    (ASX:DMP)
Transurban Group                         (ASX:TCL)
NRW Holdings Limited                  (ASX:NWH)
Boral Limited                                 (ASX:BLD)