Gator is essentially a modified version of the Alligator indicator and a supplement to it.
The Gator bar chart shows the discrepancy between Alligator lines.
If the bar chart lines are converging and are near the zero level, then Alligator lines will also be nearby.
This indicates a lateral trend on the market.
If the Gator bar chart lines are separating, the Alligator lines are also moving apart.
This indicates that there is a clear up- or downtrend on the market.