Question about stocks on Etrade?

[Joe]

I'm new to the stock market. I registered an account on Etrade and have been doing research for a few weeks. Yesterday I looked at facebook's stock and it went as low as $48, today it got up to $52. So, if I purchased 20 stocks yesterday I would make $80 in one day minus the $10 Etrade fees? Or am I missing something?

I am planning on investing about $1,000 on twitter stocks so I'll purchase about 50 stocks, can I easily buy on etrade and sell whenever I want, or is there any restrictions?

I am just kind of confused so if anyone can add any other relevant information it'll be great. I'm also not sure how I can later get the money. I can buy the stocks on etrade but then after making some money can I transfer it to my bank account?

Thanks guys! Cheers.
Ok I think I was slightly misunderstood judging from the first answer. I am not interested in day swing, I can keep the stocks there for a year. I was just asking if I understand it correctly. Also, I think etrade has some policy about keeping stocks for a certain amount of time, correct me please?

Like I said I wasn't referring to day trading or swing, just asking in general if my assumption is correct.