SPY may have put in an exhaustion gap today.
The volume on SPX an SPY have trickled off steadily as price has climbed. Volume is reaching down into sub-average range.
Tomorrow the NFP numbers come out before the market opens. Perhaps poor numbers will be the impetus for a turn in Stocks.
Here is technical picture of the ETF SPY, which tracks the S&P 500 (SPX):

The volume action suggests that a distribution top is very possible as more trades are selling into a moderately rising top.
...