I have H1B.Can I do stock trading. I didt have any idea. And I did some trading for last 3-4 months. I got profit $10 after investing 1200.Pls suggest

You are allowed to purchase stocks and otherwise invest your money so long as your activity does not constitute day trading. Day trading would be considered work. Working for anyone other than the sponsoring employer is a violation of your nonimmigrant status. You can read more about H-1B status at http://myattorneyusa.com/work-visas.