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