The last SP500 high coincided with sistematic divergences on the weekly and monthly charts. IT is shown as the last resistance should SP500 continue higher.
I have also drawn on the chart a correction pattern A-B-C which normally follows a 5-Wave impulse. The current price action fits the establishment of wave B.
Also and taking a ten year long chart all major high of SP500 I have checked that in all previous SP500 markets they have been preceded by divergences. Also when looking at VIX indicator which is some sort of fear gauge of the market. It can be seen that at the contrary of previous corrections the VIX indicator has show a spike of the same magnitude of the ones that can also be seen at premisses of other markets.