#education purpose
# indie:lang_version = 4
from indie import indicator, plot, color, Plot
from indie.algorithms import StdDev

@indicator('Standard Deviation', overlay_main_pane=True)
@plot('stddev', color=color.YELLOW)
def Main(self):
    stddev = StdDev.new(self.close, 20)
    return Plot(stddev[0])