Trading stocks / TN status

I am working in Arizona under TN visa, and interested in risking some dollars in trading stocks

Am I allowed to do so while in TN status?
is it considered as another revenu than from my company?

If yes, do you know some brokers cheap?

thanks

It's not considered employment income so you're not violating TN-1 status, whether you can do it depends on whether your tax home is in the US, if it's not you need to use a Canadian broker (I think, there may be a way of using a US broker if you're non-resident, a lot of US brokers are registered in Canada).

The usual advice would be to use one of the on-line brokers, but the Patriot Act makes that tricky because financial institutions have to have a customer identification programme. There are a couple of on-line brokers in the US that will accept Canadians who are resident in the US (and by resident, you file taxes as a resident) can't remember them off-hand, there was another thread on here that mentioned them. You have to send them a copy of your passport and other ID.