Hello Aspirant

Ofcourse there is a possibility of doing graduate in foreign universities like Harvard and Stanford but for that you will need to maintain atleast 8.5 CGPA for 4 years and have many internships and projects in your college time and even have a 2-3 year industry knowledge after doing B.tech and you will need to get really Good marks in GRE(exam you need to give to do masters in abroad ) and IELTS/TOEFL(english exam to prove that you know english compulsory) and maybe even CAT exam.If you follow all these  then only you will be able to study in a foreign university .

Hope it helps you