Expansion Contraction LibraryLibrary "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
