# indie:lang_version = 5
from indie import indicator, format, param, level, color, plot, MutSeriesF
from indie.algorithms import Sum
from indie.math import divide


@indicator('ADR_B', format=format.PRICE)  # Advance/Decline Ratio (Bars)
@param.int('length', default=9, min=1)
@level(1, line_color=color.GRAY, title='Equality Line')
@plot.line(color=color.BLUE, title='ADR_B')
def Main(self, length):
    is_up = (self.close[0] - self.open[0]) >= 0.0

    is_down_ints = MutSeriesF.new(0 if is_up else 1)
    is_up_ints = MutSeriesF.new(1 if is_up else 0)

    down_bars = Sum.new(is_down_ints, length)
    up_bars = Sum.new(is_up_ints, length)

    return divide(up_bars[0], down_bars[0], up_bars[0])