Browse Symbol Stacks: $SPX: spx_20_06_2016.png
June 20, 21, 22 is a days of big treasury auctions. It might hit market again like auctions of June 7, 8, 9 did. This time coincide with BREXIT vote. SP500 might break blue uptrend line and then move to red line support.
https://www.treasurydirect.gov/instit/instit.htm?upcoming - upcoming auctions