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


@indicator('TSI', format=format.PRICE, precision=4)  # True Strength Indicator
@param.int('long_len', default=25, min=1, title='Long Length')
@param.int('short_len', default=13, min=1, title='Short Length')
@param.int('signal_len', default=13, min=1, title='Signal Length')
@level(0, line_color=color.GRAY, title='Zero')
@plot.line(color=color.BLUE, title='TSI')
@plot.line(color=color.RED, title='Signal')
def Main(self, long_len, short_len, signal_len):
    tsi = Tsi.new(self.close, long_len, short_len)
    return 100 * tsi[0], 100 * Ema.new(tsi, signal_len)[0]