# indie:lang_version = 5
from indie import indicator, format, param, level, color, plot
from indie.algorithms import CumSum, Mfv, Ema


@indicator('Chaikin Osc', format=format.VOLUME)  # Chaikin Oscillator
@param.int('fast_length', default=3, min=1, title='Fast Length')
@param.int('slow_length', default=10, min=1, title='Slow Length')
@level(0, line_color=color.GRAY, title='Zero')
@plot.line(color=color.RED, title='Chaikin Oscillator')
def Main(self, fast_length, slow_length):
    ad = CumSum.new(Mfv.new())
    ch_osc = Ema.new(ad, fast_length)[0] - Ema.new(ad, slow_length)[0]
    return ch_osc