What are my chances for PhD program from an Ivy League institution if I have an MS degree from a good US university?

What are my chances for PhD program from Harvard (or any other Ivy League institutions) if I have a masters degree (STEM category) from a good US university (UTD or UTA for example)?

I’m pursuing BTech (ECE) from a college affiliated to WBUT (West Bengal University of Technology) and am currently in 3rd year.