Forecasting of price daily ranges. This indicator shows the resistance and support levels of the current day, the levels are forecasted on the basis of the price levels of the previous day. You can find the calculation formulas in Thomas Demark's book: "The New Science of Technical Analysis".
The minimums and maximums of the previous day are used. I'm sorry that I wrote it without comments.RAVI (Range Action Verification Index)
It is developed on the other principle, not on ADX's. Chand suggests 13-weeks SMA as a basis of the indicator.