The script is intended to indicate when the correlation between VIX and VVIX gets below 0, on the selecteted security chart. It makes sense to plot it on indicies. This aims to present how the chart of a security looked like when the divergance between VIX and VVIX happened.
リリースノート:
Added some improvements - the main change was to detect a situation when VVIX was falling while VIX rising and exclude such cases from calc. This would cause the correlation to break but that's not the alarming market environment. It is the opposite case - when implied vol of VIX is rising (VVIX) while VIX is resting.