- A Green Circle indicated the price is likely to go up.
- A Red Circle indicates to price is likely to go down.
- A Yellow Circle means there's some indecision and you should consider tightening stops or taking profits if you're already in a trade.
The circles are derived from the combination of a dozen or so indicators with the goal to simplify trading and declutter the charts.
It doesn't need to paired with another indicator but having some simple moving averages and keeping an eye on the might help you identify possible take profit areas.