What are my chances for Texas A&M?

<p>I'm kind of stressing because I know I won't recieve a response from A&M for while. I want to know if I have a good chance at getting in, I feel like I'm on the bubble. I applied in October if that increases or decreases my chances.
I have a 4.53/5 gpa.
Top 20% in class
Rank 112/545
27 on act
30 English
27 math
27 science
25 reading
I don't have much volunteer hours.
Also, do they notice an increase in grades? My grades were bad freshman year, decent sophomore year, but increased a lot junior and senior year.</p>