Oh, btw, because I just noticed this:

Yes, you can, though this aspect of reading filters is a paid account feature (not sure if it's regular or premium).

All paid accounts, whether regular or premium, get access to exactly the same features. The only difference is the limits. So if such advanced reading filters had any limits on them, premium paid users would get more of these reading filters than regular ones would, but they'd both have the feature.

But there is no limit on this one, so. :D