High Minus Low is an indicator that simply calculates the fluctuations of Range (High minus Low) of each daily bar.  

Historical volatility, as the name implies, measures the volatility of a market in the past, i.e. the historical fluctuation of price.  As such it uses historical price data for the calculation. The calculation of volatility is the standard deviation of the natural logarithmic price change.  

Bollinger Bands contain three lines: a moving average, an upper band and a lower band. The upper band equals K times a standard deviation above the moving average and the lower band K times a standard deviation below the moving average. The standard deviation uses the same period as the moving average.

IFRAMA stands for Fractal Adaptive Moving Average and is another stroke of genius from John F Ehlers. It utilizes Fractal Geometry in an attempt to dynamically adjust its smoothing period to suit the changing price action over time.

  The Keltner Channel is a moving average band indicator whose upper and lower bands adapt to changes in volatility by using the average true range.

The PRC indicator applies a polynomial function to the linear regression function to adapt itself to the flow of market prices. Since they are regression bands that self adjust for volatility.

This indicator uses polynomial regression to calculate first the center of gravity of a moving price and 3 standard deviations to upwards (red stripes) and 3 down (green stripes).