The volatility index oscillator (VIX).
It has two parameters:
- Period - calculation period (default 22)
- Drawing style:
- Line - a colored line
- Histogram - a colored histogram
The original calculation formula:
WVF = [Highest (Close,22) - Low) / (Highest(Close,22)] * 100

Fig.1. VIX displayed as a line

Fig.2. VIX displayed as a histogram