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help using indicators



  • I'm trying to figure out how to use indicators, specifically Fractals(). How do we know how many arguments to use and what to use as arguments for each indicator? I tried

    self.fractalTest = bt.studies.Fractal(self.dataclose)
    

    but got an error: AttributeError: 'Lines_LineSeries_LineSeriesStub' object has no attribute 'high'

    Even if I do get it working, when I look at the Fractals class, I don't understand what to pass as parameters. I tried this with indicators which I have used successfully like sma and I don't understand where the parameters get used and how to figure out how many and what to set them as?



  • @Wayne-Filkins Try passing in the full datas line, so:

    def __init__(self):
        self.myfrac = bt.studies.Fractal(self.datas[0])
    

    And call the values like this.

    def next(self):
        self.log(
            f"Bearish {self.myfrac.fractal_bearish[0]:9.2f}, Bullish {self.myfrac.fractal_bullish[0]:9.2f}"
        )
    

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