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Unable to set custom/constant Transaction Fee Models for Options Contracts

I'm struggling to successfully set a constant (custom) brokerage transaction fee for options contracts. I've tried using the syntax described in the docs under "Reality Modeling" for equities, but when I run the backtest the "fees" reported do not change. Can anyone provide any guidance?

Things I've tried (that I couldn't get to work)

# Set the underlying (QQQ) to use a fixed $0.25 per trade fee model.

self.Securities["QQQ"].FeeModel = ConstantFeeTransactionModel(0.25)

Update Backtest







add a backtest and i am sure someone will take a look

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Not sure if it works for options, but for underlying you should use FeeModel instead of TransactionModel.

Securities[symbol].FeeModel = new ConstantFeeModel(0.0m);https://www.quantconnect.com/forum/discussion/1322/simple-scalping-with-williams-fractals/p1
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Update Backtest





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