Dow Jones STOXX 50/S&P 500 ($STOX50/$SPX)
The trend looks similar, but I think EURO STOXX 50/S&P has the best chart.
Here is the DJ STOXX 50 Index alone. The trend is your friend for now.
Dow Jones STOXX 600/S&P 500 ($STOXX/$SPX)
For fun, here is DJ EURO STOXX 50/DJ STOXX 50.