I use 2x UO's as a tool to identify the stability and overall condition of a trend. The UO colored blue is more reactive to price change (candles) than red one, because it takes into account less candles. The difference in rates of change is a mass mental condition of a market. The combo might predict the reversals too.
How to read a chart using it?
We'd know the uptrend is stable when Blue UO fluctuates OVER Red UO.
As blue UO reaches red band - it's time for reversal.
To confirm the reversal of an uptrend - Blue UO must cross below Red UO.
During downtrend, the blue and red UOs are reaching green band which would indicate that market is oversold.
Once Blue UO touches green band and crosses above red UO - it's time for downtrend to reverse it's direction.