I have been trying to write a class to make a custom SMA envelope indicator and store it in a rolling window, however Im having some difficulty calling the SMA method froum outside the main class, I suspect I may be going about this the wrong way. Any help would be appreciated.

 

class ENV(): #this is our custom sma envelope class
def __init__(self, symbol, period, deviation): #deviation is in percentage

self.upperRollingWindow = RollingWindow[float](20)
self.lowerRollingWindow = RollingWindow[float](20)
self.deviation = deviation/100
self.envSma = QCAlgorithm.SMA(symbol, period, Resolution.Hour)

def EnvUpperRollingWindow(self): #this function returns the rolling window
return self.upperRollingWindow

def EnvLowerRollingWindow(self):
return self.lowerRollingWindow

def UpdateEnvelope(self):
self.upperRollingWindow.Add(self.Upper())
self.lowerRollingWindow.Add(self.Lower())

def Upper(self):
#gives the upper envelope
upperEnv = self.envSma.Current.Value + (self.envSma.Current.Value*self.deviation)
return upperEnv

def Lower(self):
#lower envelope
lowerEnv = self.envSma.Current.Value - (self.envSma.Current.Value*self.deviation)
return lowerEnv