there are so many factors that go into getting a residency I think.
not in any order:
board scores, clerkship grades, first 2 year grades, are there any students from your school already in a residency program and doing well, research, interview, away rotation at a good hospital that is equal in ranking to where you want to go. It is very hard with the information you gave to really give you an answer. its like a patient that comes in with a very non-specific complaint and wants an answer to what they have.