It is possible if you use VBS, but I would highly recommend against it. A Roth IRA is very precious long-term tax-free space for investments. You do NOT want to lose money in your Roth IRA because (a) you can't tax-loss harvest it and get a tax deduction and (b) you are limited in annual contributions, so if you lose money, you cannot "top it up" with a new contribution.
And I'll let others tell you about the folly of investing in individual stocks. If you wish to try it, I highly recommend that you use a taxable account where other taxpayers will help pay for your losses.
This information has been prepared without taking into account the Sequestration, investment objectives, financial situation and particular needs of any particular person or company.