I have trading account in india whom I don't like I moved to abroad and become NRI,I was thinking of converting my trading acc into NRI bcz of complexity of NRI trading ac, I decided to open a regular trading ac in India will there be any problem?

As such there is no problem with this kind of arrangement (proxy account) as long as the IT Returns are filed (when income exceeds the exemption limits) in the name of the family member who owns the trading account.

Even though you are using the account, technically you don't own the account.

Note that moving money between your personal accounts and your family members account in large amount could also be problem.