The Price and Volume Trend index is closely related to the On Balance Volume index.
The Price and Volume Trend index generally precedes actual price movements.
The premise is that well-informed investors are buying when the index raises and uninformed investors are buying when the index falls.
|applyTo||Value can be one of ENUM_APPLIED_PRICE|
|volumeVal||Value can be one of ENUM_VOLUME_METHOD|
Returns the handles of a technical indicator, in case of failure returns an empty string.