I've got an Updata feed, which I believe is an IP feed, and am looking at whether it will work with TradeStation for example. There is some software on the web called OwnData which links Tradestation to any DDE feed, so you don't need to use Tradestations own data feed, and you can use any data source you like, such as eSignal, or even ascii files for historical use. But I have Updata which is an excellent feed, and am looking at whether I can use it elsewhere.