help using indicators

Wayne Filkins

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?

run-out

@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}"
    )