Now I see that eminis seems to be the answer to my question. Thus, as I understand, there is no limit to how many eminis I can trade per day. Thank you all for the very warm welcome and for answering my question. I'm so glad that I found such a good forum.
Now, I remembered another question that was bugging me. The question is, is it practical to trade the news? What I mean is, is there a way to get breaking news very fast so I can trade a stock right before or during the time it is going up initially. I found a site that seems to be suggesting that:
http://www.tradethenews.com/