Class: RubyTechnicalAnalysis::IntradayMomentumIndex

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

Overview

Intraday Momentum Index

Find more information at: www.investopedia.com/terms/i/intraday-momentum-index-imi.asp

Instance Attribute Summary collapse

Attributes inherited from Indicator

#series

Instance Method Summary collapse

Methods inherited from Indicator

call

Constructor Details

#initialize(series: [], period: 14) ⇒ IntradayMomentumIndex

Returns a new instance of IntradayMomentumIndex.

Parameters:

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

    An array of arrays containing open, close prices, e.g. [[open, close], [open, close]]

  • period (Integer) (defaults to: 14) —

    The number of periods to use in the calculation



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

def initialize(series: [], period: 14)
  @period = period
  @gsum = 0
  @lsum = 0

  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/intraday_momentum_index.rb', line 6

def period
  @period
end

Instance Method Details

#call ⇒ Float

Returns The current Intraday Momentum Index value.

Returns:

  • (Float) —

    The current Intraday Momentum Index value



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# File 'lib/ruby_technical_analysis/indicators/intraday_momentum_index.rb', line 19

def call
  calculate_imi
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/intraday_momentum_index.rb', line 24

def valid?
  period <= series.length
end