You do want the kind of consideration that comes from the counselors placing your application solely in the context of what your high school offers, and up against what others from your high school have done when presenting their applications for consideration for admission, @project21.
The consensus is you are not judged and held to the standard of the next high school and its offerings for the very reasons you state: you had no choice in where you attended.
How hard you worked to succeed where you are is what will help add weight to your application.