I've been thinking about this, too. Another solution would be a function that ignores non-orange cards (this only goes for the RepeatAdvisor color mode), so that you can see how many cards you have to review. What I have to do do several times every day is to select all stacks that contain orange cards, check their details, manually count how many are orange and then make the equation total number of selected cards minus orange cards, to be able to know what the "cards left" counter should be at when i'm finished.