/Python/Bill wiliams fractal python pandas

Bill wiliams fractal python pandas

def roll(df):
    bear_fractal = df['high'].rolling(5, center=True).apply(lambda x: x[2] == max(x), raw=True)
    bull_fractal = df['low'].rolling(5, center=True).apply(lambda x: x[2] == min(x), raw=True)
    return bear_fractal, bull_fractal

Source: codereview.stackexchange.com

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