class UncoupledMultidimensionalReplicator(QCAlgorithm):

    def Initialize(self):
        self.SetStartDate(2020, 5, 8)  # Set Start Date
        self.SetCash(100000)  # Set Strategy Cash
        self.AddEquity('SPY', Resolution.Daily)
        self.AddAlpha(InvestorSentimentSurveyAlphaModel(self))
        self.SetPortfolioConstruction(EqualWeightingPortfolioConstructionModel())

class InvestorSentimentSurveyAlphaModel(AlphaModel):
    
    def __init__(self, algorithm):
        
        ## Add Quandl data for AAII Investor Sentiment Survey
        self.bullBearSpread = algorithm.AddData(QuandlData, 'AAII/AAII_SENTIMENT',Resolution.Daily).Symbol
        
        self.sma = algorithm.SMA(self.bullBearSpread, 10, Resolution.Daily)
        
    def Update(self, algorithm, data):
        if self.sma.IsReady:
            algorithm.Plot('Custom Data', 'SMA', self.sma.Current.Value)
        insights = []
        
        # Return if no data
        if not data.ContainsKey(self.bullBearSpread): return insights
        
        # This Alpha model uses the Bull-Bear spread from AAII Investor Sentiment Data.
        # A Bull-Bear spread is the difference in percentage between bullish investors and the percentage of bearish investors.
        # A positive Bull-Bear spread might be a leading indicator that predicts an equity market rally. 
        # Similarly, a negative Bull-Bear spread might be a leading indicator that predicts an equity market selloff.
        
        spread = data[self.bullBearSpread].Value
        
        
        if spread > 0:
            insights.append(Insight.Price('SPY', timedelta(1),  InsightDirection.Up))
        
        return insights
        
    def OnSecuritiesChanged(self,algorithm,changes):
        ## The Quandl Symbol, self.bullBearSpread, will appear in changes.AddedSecurities
        pass
    
class QuandlData(PythonQuandl):
    
    def __init__(self):
        ## Retrieve the data from the the Quandl object, specifying the data field used on Quandl
        self.ValueColumnName = "BULL-BEAR SPREAD"