# Comparison of the custom indicator by Vladimir "Awesome Oscillator" and the built-in QC  

class CustomIndicatorAlgorithm(QCAlgorithm):
    
    def Initialize(self):
        self.SetStartDate(2021, 1, 1) 
        self.SetEndDate(2021, 7, 2)   
        self.stock = self.AddEquity('SPY', Resolution.Daily).Symbol
        self.SetWarmUp(50, Resolution.Daily)
        self.AwesomeOsc = CustomIndicator('Awesome Osc', 5, 34)
        self.RegisterIndicator(self.stock, self.AwesomeOsc, Resolution.Daily)
        self.awesome_osc_qc = self.AO(self.stock, 5, 34, MovingAverageType.Simple, Resolution.Daily)
        

    def OnData(self, data):
        if self.IsWarmingUp or not (self.awesome_osc_qc.IsReady or self.AwesomeOsc.IsReady): return

        self.Plot("Awesome Osc", "AwesomeOsc_Custom", self.AwesomeOsc.Value)
        self.Plot("Awesome Osc", "AwesomeOsc_QC", self.awesome_osc_qc.Current.Value)
        self.Plot("Awesome Osc", "Zero", 0)
            

class CustomIndicator(PythonIndicator):
    def __init__(self, name, fast, slow):
        self.Name = name
        self.Time = datetime.min
        self.Value = 0

        self.fast = SimpleMovingAverage(fast) 
        self.slow = SimpleMovingAverage(slow)

        self.Period = slow

    def Update(self, input):
        self.Time = input.EndTime
        self.Value = 0

        mp = (input.High + input.Low ) / 2
        if not self.fast.Update(input.Time, mp):
            return False
        if not self.slow.Update(input.Time, mp):
            return False
        self.diff = (self.fast.Current.Value - self.slow.Current.Value)

        self.Value = self.diff

        return True