Hey i was wonding hoe u get those high pitced trills or squeals on the alto sax liek if theres any tricks to it or anything i need to know to help me out

It`s called "altissimo" playing, and it takes years to develop, even practicing 5x/week. The "bible" for it is "Top Tones for the Saxaphone" by Rascher. Amazon says it`s out of print, but my local store has several copies. Follow his advice-- don`t skip pages- start on page 1 and don`t turn until you have mastered that page.