Just look at the image...Order flow of S&P 500 E-mini Futures

Huge Offers @ 4500 for S&P 500 E mini Futures...it suggests Portfolio Managers are Hedging their Cash market portfolio with S&P E mini futures and they are skeptical about the 4500 levels on S&P 500 Index...if the index get hits on 4500...we may witness huge short covering and rally above 4500....It's indeed good for Nifty on Monday.

All About Indices - 5291286