This indicator shows the three and four-bar play which is when price action has a wide igniting bar that has a full body, then one or two narrow bars which have a relatively equal high for long plays and relatively equal low for short plays, then a continuation bar. You should not take plays that will encounter resistance.
Jared Wesley is one of the more notable traders that use this setup. There will be a label placed on the chart when a play occurs. You can edit as an input the igniting bar size, the body percentage of the igniting bar, and the relative equality of the 2nd (and 3rd bar for 4 bar play) compared to the igniting bar.