I have had a lot of problems with that website.. pitty really because it's potentially useful.. I hardly use it now and their support leaves a lot to be desired.. You get what you pay for in the end.. lol
I just checked it and it does provide a ral time streaming quote for the SP500.. maybe they ar getting better.. if it serves your purpose, fine. Personally I don't trade that instrument. I have nothing against free sites.. I use them all the time. I'm sure you are aware of bigcharts.com symbol SPX, but you have to keep refreshing it (on the othe hand you can use autorefresh). The good thing about bigcharts is you can choose your own timeframes, drow trendlines and indicators etc. Hope it helps
PS big charts can automatically email you your favourite charts nice and ready for the morning!