This article explains the red/green circles in the SMART Channel Manager.
When you hover with your mouse over a rate, you will see an information cloud with red/green circles. These are the names of the connected - and not connected- booking websites. A green circle means that the booking website is activated and you can use the Channel manager for managing prices and availability. A red circle means the booking website is not activated yet and you have to use the booking websites' extranet for managing prices and availability.