Better stop short than fill to the brim. Oversharpen the blade, and the edge will soon blunt. Amass a store of gold and jade, and no one can protect it. Claim wealth and titles, and disaster will follow. Retire when the work is done. This is the way of heaven.
— Tao Te Ching
The Zig Zag indicator plots points on the chart whenever prices reverse by a percentage greater than a pre-chosen variable. Straight lines are then drawn, connecting these points. The indicator is used to help identify price trends. It eliminates random price fluctuations and attempts to show trend changes. Zig Zag lines only appear when there is a price movement between a swing high and a swing low that is greater than a specified percentage; often 5%. By filtering minor price movements, the indicator makes trends easier to spot in all time frames.