Smooth MTF EMA trend (4 colors)

It's EMA20 on multi-timeframe but the line is smoother than original MTF line.

Support timeframe is: 1m 5m 15m 30m 1h 4h 1d 3d 1w.

Trend color:

• strong up > aqua
  
• weak up > teal
  
• strong down > fuchsia
  
• weak down > purple