What is the SpotGamma Imp 1 Day Move? The SpotGamma Imp 1 Day Move is a proprietary estimate of how much the SPX index may move the for the next cash session. Why does the SpotGamma Imp 1 Day Move matter? Our gamma derived estimate provides a valuable 1 day estimate of SPX movement. How to use the SpotGamma Imp 1 Day Move? To calculate the estimated range on the day, ± the SG Implied Move from the SPX cash price. This is our estimated 1 standard deviation range for the day. Related articles What is the SpotGamma Imp 5 Day Move? What is Volatility Trigger™? What is the SpotGamma Gamma Index? What are Zero Gamma Levels? What is the SpotGamma Abs. Gamma Strike?