The Negative Volume Index (NVI) is often used in conjunction with the Positive Volume Index (PVI) to identify bull and bear markets. The NVI focuses on days when the volume has decreased from the previous day. NVI’s premise is that the “uninformed crowd” takes positions on days when volume increases. The signal line is usually a 255 exponential moving average, but it can be adjusted.
This is a companion discussion topic for the original entry at https://www.optuma.com/kb/optuma/tools/volume/negative-volume-index