I am new to QC. After reading the BootCamp, I would like to try to develope strategies by following the framework. Here is my test case. I would like to pass a variable to Alpha Model from the QCAlgorithm class, is it possible?

Here is my test code:

class QuantityTesting_Insight(QCAlgorithm):
    isFirstOrder = True # variable I want to pass
    def Initialize(self):
        self.SetStartDate(2020, 1, 13)  # Set Start Date
        self.SetEndDate(2020, 1, 18)  # Set End Date
        self.SetCash(100000)  # Set Strategy Cash
        # user variables
        # self.isFirstOrder = True
        # Handle UniverseSettings
        self.UniverseSettings.Resolution = Resolution.Minute
        symbols = [Symbol.Create("SPY", SecurityType.Equity, Market.USA)]
        self.SetSecurityInitializer(lambda x: x.SetDataNormalizationMode(DataNormalizationMode.Raw))
        # Handle Alpha Model
        # Handle Portfolio Model

class TestingAlpha(AlphaModel):

    def __init__(self):
    # override
    def Update(self, algorithm, data):

        insights = []
        if not isinstance(algorithm, QuantityTesting_Insight):
            return insights
        algorithm.__class__ = QuantityTesting_Insight
        if not algorithm.isFirstOrder:
            return insights
return insights

I have a variable named isFirstOrder, which is a boolean. When I cast the class back to QunatityTesting_Insight, I get error message, `'QuantityTesting_Insight' object layout differs from 'QCAlgorithm'`

I would like to ask if there a way to do this action? Or I should use other method to pass variable instead of using QCAlgorithm class? Thank you very much.