Does anyone have a good method for calculating pivot points for SPY that incorporates the overnight highs and lows in the ES?? I also have the problem that I am not sure that the price levels in SPY match up with the front month ES contract, for instance lets say the price of ES is 1336.50 then SPY would be 133.65. I cant afford a data feed for futures right now and I am trying to test some stuff out. Thanks.