S&amp;P 500 v. Feature Match Density.

Essentially, it's a representation of the days in which trading conditions (based on abt 106 criteria) matched today's trading environment. 

$SPX $SPY $VIX $VXX $XLF $XLY $AAPL $FB $MSFT $AMZN https://t.co/udyK7AswHn