Yes you can. On Scottrade, click the "Trade" tab, click "Advanced Orders" on the left bar, then click "One Cancels Other/All"

YES, you can do so. Its the price level that will decide if the transaction takes place or not.

Hello,

I'd really appreciate if someone can give me an advice on the following:

Let'assume I bought 100 shares for 30$. If the price goes up by 1$, I'd like to sell it at 31$ and take profit. So I put the limit order at 31$. At the same time if the price drops to 29$ I'd like to sell it to stop-loss. My question is - can I place 2 orders at once? I place a limit TP order at 31, and a limit SL order at 29. Can I do that? If yes - how?

P.s. I'm using scottrade. Thank you