The Zig Zag filters out small movements in price to highlight trends. It looks for
price moves greater than the threshold level and plots straight lines between those
points. The Zig Zag is more of a visual tool than an indicator. It is non-predictive;
in fact, the formula looks forward in time to find the zig zag points. The purpose
of the Zig Zag is to make chart patterns clearer.
