Kow_dude, as your fellow former student of HBHS, I don't advise you to change to Advanced unless you're good at english. You're wrong in thinking that Advanced will get you higher- it won't.
Advanced and Standard are scaled together - standard is not capped, it's just that no one can go good in it. Take our school, I'm the only one in our entire school who got a band 6 in english, and we had some good students (I got lucky
) So don't fool yourself, it's very risky to choose advanced if you're not good at it...Morey and Roberts would eat you alive lol
Also, the worse you go in english, the worse the scaling is.