Williams Gator Oscillator

// The Gator Oscillator histogram above zero shows the absolute difference between blue and red lines of Alligator indicator,
// while histogram below zero shows the absolute difference between red and green lines.
//
// There are green and red bars on the Gator Oscillator histograms.
// A green bar appears when its value is higher than the value of the previous bar.
// A red bars appears when its value is lower than the value of the previous bar.
//
// Gator Oscillator helps to better visualize the upcoming changes in the trends: to know when Alligator sleeps, eats, fills //out and is about to go to sleep.