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Negative Volume Index

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NegativeVolumeIndex(Vector)
NVI(Vector)

Overview
The Negative Volume Index is similar to the Positive Volume Index, except it puts focus on periods when volume decreases from the previous period.

Interpretation
The interpretation of the Negative Volume Index is that well-informed investors are buying when the index falls and uninformed investors are buying when the index rises.

Recommended Parameters
Vector: CLOSE

Example
set NVI =NVI(CLOSE)
plot(NVI, line, red, NVI)

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