Visual Basic (Declaration)  

Public Overloads Shared Function NegativeVolumeIndex( _ ByVal s As Series _ ) As Series 
Visual Basic (Usage)  Copy Code 


Parameters
 s
 An series where the first element is the closing price in the last trading period, the second term is the closing price in the previous trading period and so on.
Exception  Description 

ArgumentException  Thrown if the series is empty or contain negative values. 
Indicator Formula
The formula for this indicator is:
If the volume is less then the yesterday volume then: NVI = Yesterday's NVI + (((Close  Yesterday's Close)/Yesterday's Close) *Yesterday's NVI)
If today's volume is greater than or equal to yesterday's volume then:
NVI = Yesterday's NVI
Allways the first element of an financial array will be a value of the most recent period considered.