Class: RubyTechnicalAnalysis::RelativeStrengthIndex

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

Overview

Relative Strength Index

Find more information at: www.fidelity.com/viewpoints/active-investor/how-to-use-RSI

Instance Attribute Summary collapse

Attributes inherited from Indicator

#series

Instance Method Summary collapse

Methods inherited from Indicator

call

Constructor Details

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

Returns a new instance of RelativeStrengthIndex.

Parameters:

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

    An array of prices, typically closing prices

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

    The number of periods to use in the calculation



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

def initialize(series: [], period: 14)
  @period = period
  @rsi = []
  @smooth_up = []
  @smooth_down = []
  @wilders_is_set = false

  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/relative_strength_index.rb', line 6

def period
  @period
end

Instance Method Details

#call ⇒ Float

Returns The current RSI value.

Returns:

  • (Float) —

    The current RSI value



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# File 'lib/ruby_technical_analysis/indicators/relative_strength_index.rb', line 21

def call
  calculate_rsi
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/relative_strength_index.rb', line 26

def valid?
  period < series.length
end