Expansion Contraction Library

Library "ExpansionContraction"
Library for Expansion Contraction Indicator, a zero-lag dual perspective indicator created by Brian Latta based on Jake Bernstein’s principles of Moving Average Channel system.

calc(shortLookback, longLookback)
  Calculates Expansion Contraction values.
  Parameters:
    shortLookback: Integer for the short lookback calculation, defaults to 8
    longLookback: Integer for the long lookback calculation, defaults to 32
@return Returns array of Expansion Contraction values

stdevCalc(positiveShort, negativeShort, positiveLong, negativeLong, stdevLookback)
  Calculates standard deviation lines based on Expansion Contraction Long and Short values.
  Parameters:
    positiveShort: Float for the positive short XC value from calculation
    negativeShort: Float for the negative short XC value from calculation
    positiveLong: Float for the positive long XC value from calculation
    negativeLong: Float for the negative long XC value from calculation
    stdevLookback: Integer for the standard deviation lookback, defaults to 500
@return Returns array of standard deviation values

trend(positiveShort, negativeShort, positiveLong, negativeLong)
  Determines if trend is strong or weak based on Expansion Contraction values.
  Parameters:
    positiveShort: Float for the positive short XC value from calculation
    negativeShort: Float for the negative short XC value from calculation
    positiveLong: Float for the positive long XC value from calculation
    negativeLong: Float for the negative long XC value from calculation
@return Returns array of boolean values indicating strength or weakness of trend