What is this:
For any index/underlying, this calculates the possible range of price within which the underlying is expected to move till the expiry date that is entered given the current volatility.
It is best to use India VIX with a little buffer as the starting point.
Most useful in creating short straddles keeping these boundaries in mind.
Please note that this calculation only takes into account volatility index as entered but has no clue about any impending major political/financial events which can drastically impact the VIX.