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VIX Range

This indicator shows the daily expected trading range of the instrument.

An upper and lower line denotes the range. It is calulated based on the volatility index selected (NSE:India VIX is used by default). Also it shows developing upper and lower line for the next trading day.

Non-directional option strategies (like straddle, strangle) can be performed based on the expected trading range.
Note di rilascio
A center line is plotted at middle of the upper and lower range.
Note di rilascio
Minor fixes

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