I'm running SierraChart with a Silver plan datafeed from www.MyTrack.com
Im very impressed with SierraChart. It is a great package for charting. I use it for real-time trading and although there is quite a bit of dud data that gets used, you can manually edit it out.
From what Ive read about the new updates coming through, it makes you wonder what else can be added as I believe it is the complete technical analysis package. Its also very cheap for the functions it has ($40 for 6 months). You also have to have a data feed and I pay £30 a month to Mytrack, which gives me live US stock and index prices as well as UK stocks delayed by 15 minutes.
Overall a great package.