It's a take on the "Stochastic POP" Jake Bernstein writes about. Basically, trading the S&P intraday on a timeframe of 15 minutes, you watch for the Stoch to hit 75 and that's a buy signal until it crosses down from 75. Now, I think bundlemaker is referencing Jack Hershey, who admittedly borrowed that idea of the "pop", and added other componenets to the setup, such as the necessity of a minimum amount of volume, and the particular MACD short term settings to show trending.