class CalibratedVentralCircuit(QCAlgorithm):

    def Initialize(self):
        self.SetStartDate(2020, 3, 13)  # Set Start Date
        self.SetCash(100000)  # Set Strategy Cash
        
        tickers = ['SPY', 'BND']
        symbols = [ Symbol.Create(ticker, SecurityType.Equity, Market.USA) for ticker in tickers ]
        self.AddUniverseSelection( ManualUniverseSelectionModel(symbols) )
        
        # Add Liquid Universe 
        
        
        self.SetAlpha(MyAlphaModel())
        
        self.SetPortfolioConstruction(EqualWeightingPortfolioConstructionModel())
        
        self.SetExecution(ImmediateExecutionModel())


class MyAlphaModel(AlphaModel):
    spy = None
    spy_sma = None
    bnd = None
    liquid_symbols = []
    
    def Update(self, algorithm, data):
        # if spy > spy_sma:
        #     emit insights for the liquid symbols
        # else:
        #     emit insight for BND
        
        return []
        
    def OnSecuritiesChanged(self, algorithm, changes):
        for security in changes.AddedSecurities:
            ticker = str(security.Symbol).split()[0]
            if ticker == 'SPY':
                self.spy = security.Symbol
                
                # Setup spy SMA
                
                # Warm up spy SMA
                
                
            elif ticker == 'BND':
                self.bnd = security.Symbol
            else:
                pass # Add symbol to liquid symbols list
            
        for security in changes.RemovedSecurities:
            pass # remove symbol from liquid symbols list