class ModulatedVerticalComputer(QCAlgorithm):

    def Initialize(self):
        self.SetStartDate(2015, 9, 14)  # Set Start Date
        self.SetCash(100000)  # Set Strategy Cash
        self.AddEquity("QQQ", Resolution.Minute)


    def OnData(self, data): 
        if not self.Portfolio.Invested:
            self.SetHoldings("QQQ", 1)