It seems as if the Futures for the S&P 500 on the 240 min chart has completed a Head & Shoulders pattern with testing the neckline twice already. The projected target down is around 4140, and bearing in mind the monthly #SPX chart where technical indicators are hugely overbought (e.g. MACD, but just turned south), all these together in my view point to the start of a significant downturn.