Method: TechnicalAnalysis::StockCalculation.ema

Defined in:
lib/technical_analysis/helpers/stock_calculation.rb

.ema(current_value, data, period, prev_value) ⇒ Object 



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# File 'lib/technical_analysis/helpers/stock_calculation.rb', line 16

def self.ema(current_value, data, period, prev_value)
  if prev_value.nil?
    ArrayHelper.average(data)
  else
    (current_value - prev_value) * (2.0 / (period + 1.0)) + prev_value
  end
end