Alligator indicator consists of 3 lines. They are Moving Averages with various parameters. Here they are:
The First line, or the chap of alligator, is a line of balance to the considerable period of time. It's used for the chart constructing - 13 period smoothed shifting average, moved on 8 bars to the future. The Green line, or the lips of alligator, is the line of balance for the considerable period of time, which is one more step less - 5 period smoothed shifting average, moved on 3 bars to the future. The Red line, or the teeth of alligator, is the line of balance for the considerable period of time, which is one step less - 8 period smoothed shifting average, moved on 5 bars to the future.
How to interpret the lines? When all of them are jolloped, it means that the "Alligator" is sleeping, and the more it sleeps the more hungry it gets. Of course, when it wakes up after long sleep, it's very hungry and starts "hunting for food", which is price, till it is glutted. As soon as it happens, it looses interest to the food, which is price, and then the balance lines meet at the same point. It's when you should fix your profit. It's time to close all positions and wait till Alligator awakes up next time.