You’re new here, so possibly you haven’t seen this thread; It’s from an MIT Admissions Director about chancing for MIT, but everything holds true for Harvard as well: http://talk.collegeconfidential.com/massachusetts-institute-technology/939227-reminder-no-one-not-even-me-can-give-you-an-accurate-chance-at-mit-p1.html
The most anyone can say from your post is that your test scores and GPA make you a competitive applicant. However, as Harvard receives more applications from competitive applicants than they have room for in their freshman class, Admissions uses a student’s teacher recommendations, guidance counselor’s Secondary School Report (SSR), interview report and essays to select one high performing applicant over another. As you haven’t posted that information (nor should you), no one can say what kind of chance you have.
That said, your chances as an international applicant are not the same as a US applicant. Please go to: http://www.hio.harvard.edu/statistics and from the pull-down menus select STUDENTS, HARVARD COLLEGE (the undergraduate school) and YOUR COUNTRY, and then elect GO. The number that appears is the total number of freshman, sophomores, juniors and seniors enrolled at Harvard from your country. Divide that number by four to get an idea of how many students Harvard admits on average from your country per year. Harvard doesn’t publish the number of applicants from each country, so you have to ask your guidance counselor for their estimate and then gauge your overall chances. As an international student applying in the RD round, I would think your chances are less than the overall chances for RD applications, which last year was 3.23%.