The first way to use the indicator is with a short lookback period. It then will paint yellow most of the time, with red marking a sharp recent breakdown in price and green marking a sharp breakout in price. This can be used to follow the breakout, or to fade it.
The second way to use the indicator is a long lookback period. This will change the output to be colored most of the time, with small sections of yellow. The yellow indicators areas where price has not made a large move in a while, or periods of consolidation. This can then be used to plan reversal trades, or follows any new trend.
The blue line is a Rank, when this value is high, it means that breakouts are less likely to trigger, since price has been moving rapidly recently, and a relative breakout would have to be a large move. When the line is low, breakouts will trigger more easily, since price has been moving relatively slowly