MACD - Volume Weighted Average Pricing indicator.
Top Line - Long Position Indicator (Green Good)
Bottom Line - Short Position indicator (Green Good)
Rolling Line - Price Variation from Volume Weighted Average. (Red Critical Distance, consider closing position)
This indicator is used to identify exit times for positions.
Indicator Below 0 and Red - Consider Closing Short Position
Indicator Above 0 and Red - Consider Closing Long Position