# indie:lang_version = 5
from indie import indicator, format, param, plot, color
from indie.algorithms import SinceLowest, SinceHighest


@indicator('Aroon', format=format.PRICE)  # TODO: format=format.PERCENT
@param.int('length', default=14, min=1)
@plot.line(color=color.BLUE, title='Aroon Down')
@plot.line(color=color.YELLOW, title='Aroon Up')
def Main(self, length):
    lo_offset = SinceLowest.new(self.low, length)
    hi_offset = SinceHighest.new(self.high, length)

    down = 100 * (length - lo_offset[0]) / length
    up = 100 * (length - hi_offset[0]) / length

    return down, up