This indicator shows the average daily range. By default shows one day Daily Range. It can be customised upto 100 days. Strongly suggested to use 1-5 days only.
It also plots 4 lines which are by default 10 day average Daily Range (ADR) with 50% of ADR, 75% of ADR, 100% of ADR and 125% of ADR.
These are used to calculate potential daily targets.
However, the most important usage is on daily chart for the next day analysis for trading intraday. If DR is less than 50% of the ADR (BOTTOM MOST LINE), the color of the bar will be in red which indicates that there is heavy contraction which could possibly followed by expansion. This could possibly lead to a trending day and hence traders can prepare well in advance.