LinTrendLib

Library "LinTrendLib"
TODO: add library description here

ema_trend(twz, ema_length, cross_ratio, multiplier)
  Given Bullish / Bearish / side-way market jugement
  Parameters:
    twz (int)
    ema_length (simple int)
    cross_ratio (float)
    multiplier (float)
  Returns: 1 --> bullish trend, -1 --> bearish trend, 0 --> sideway market