Class: RubyTechnicalAnalysis::VolumeRateOfChange

Inherits:
Indicator
  • Object
show all
Defined in:
lib/ruby_technical_analysis/indicators/volume_rate_of_change.rb

Overview

Volume Rate of Change

Find more information at: www.investopedia.com/articles/technical/02/091002.asp

Instance Attribute Summary collapse

Attributes inherited from Indicator

#series

Instance Method Summary collapse

Methods inherited from Indicator

call

Constructor Details

#initialize(series: [], period: 25) ⇒ VolumeRateOfChange

Returns a new instance of VolumeRateOfChange.

Parameters:

  • series (Array) (defaults to: []) —

    An array of volume values

  • period (Integer) (defaults to: 25) —

    The number of periods to use in the calculation



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# File 'lib/ruby_technical_analysis/indicators/volume_rate_of_change.rb', line 10

def initialize(series: [], period: 25)
  @period = period

  super(series: series)
end

Instance Attribute Details

#period ⇒ Object (readonly)

Returns the value of attribute period.



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# File 'lib/ruby_technical_analysis/indicators/volume_rate_of_change.rb', line 6

def period
  @period
end

Instance Method Details

#call ⇒ Float

Returns The current volume rate of change value.

Returns:

  • (Float) —

    The current volume rate of change value



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# File 'lib/ruby_technical_analysis/indicators/volume_rate_of_change.rb', line 17

def call
  calculate_volume_rate_of_change
end

#valid? ⇒ Boolean

Returns Whether or not the object is valid.

Returns:

  • (Boolean) —

    Whether or not the object is valid



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# File 'lib/ruby_technical_analysis/indicators/volume_rate_of_change.rb', line 22

def valid?
  period < series.length
end