# indie:lang_version = 5
from indie import indicator, format, plot, color, MutSeriesF
from indie.algorithms import Change, Ema


@indicator('Klinger Osc', format=format.VOLUME)  # Klinger Oscillator
@plot.line(color=color.BLUE, title='KO')
@plot.line(color=color.GREEN, title='Signal')
def Main(self):
    sv = MutSeriesF.new(self.volume[0] if Change.new(self.hlc3)[0] >= 0 else -self.volume[0])
    kvo = MutSeriesF.new(Ema.new(sv, 34)[0] - Ema.new(sv, 55)[0])
    sig = Ema.new(kvo, 13)
    return kvo[0], sig[0]