High/Low Bands   

High/Low Bands consist of triangular moving averages calculated from the underling price, shifted up and down by a fixed percentage and include a median value.

When prices rise above the upper band or fall below the lower band, a change in direction may occur when the price penetrates the band after a small reversal from the opposite direction.

Usage:
It is used to relative price levels and volatility. It can be combined with price action and other indicators to generate signals and foreshadow significant moves.