Hello,
I used too SB on the US indices, but stopped doing it for the following reasons:
1) You cannot rely on the SB co's price being near the actual cash price, which was what I was trading on. When things are really flying, it could be 10+ points away, plus the spread, which means you have to make a significant number of points just to stand still.
The frustrating thing about this is that I was showing a good profits vs cash index but nothing on the SB,
so i couldn't do anything until the spread had moved back in line, which the majority of the time resulted in opportunities lost.
2) spreads are too expensive to day trade, IMHO. 5 to 7 on the Dow, 1 on SP, 3(?) on NASDAQ. If you are taking a position and holding for at least a few days, then fine, but for day trading it is too expensive
Factor in a bit of overtrading and found i quick way of losing money. I now trade the minis which I feel a lot more comfortable with as I know I'm not going to get screwed by the price (to the same degree anyway).
However, having said all that, it is a great way too learn and if you can master day trading with SB then the real thing should be easier. Finspreads is good because you can play with tiny amounts, but I would say that for intraday, you have to at some point move over to the actual stock or future to be successful - I'm sure there will be loads who will disagree but it is important to trade with a style you feel comfortable with, the lack of price control with SB was important enough for me to look elswhere.
I used to use finspreads, other sites maybe better, worse.
good luck with it.
.