# indie:lang_version = 5
from indie import indicator, format, param, source, level, color, plot
from indie.algorithms import Roc


@indicator('ROC', format=format.PRICE)  # Rate Of Change
@param.int('length', default=9, min=1)
@param.source('src', default=source.CLOSE, title='Source')
@level(0, line_color=color.GRAY, title='Zero')
@plot.line(color=color.BLUE, title='ROC')
def Main(self, length, src):
    return Roc.new(src, length)[0]