# indie:lang_version = 5
from indie import indicator, param, plot, color, MutSeriesF
from indie.algorithms import Roc, Wma


@indicator('Coppock')  # Coppock Curve
@param.int('wma_length', default=10, min=1, title='WMA Length')
@param.int('long_roc_length', default=14, min=1, title='Long RoC Length')
@param.int('short_roc_length', default=11, min=1, title='Short RoC Length')
@plot.line(color=color.BLUE)
def Main(self, wma_length, long_roc_length, short_roc_length):
    l_roc = Roc.new(self.close, long_roc_length)[0]
    s_roc = Roc.new(self.close, short_roc_length)[0]
    curve = Wma.new(MutSeriesF.new(l_roc + s_roc), wma_length)[0]
    return curve