Here's a cool approach to trading the STOXX 50... The idea hinges on the thesis that changes in Order Flow precede changes in Price...and that all short term changes in price are predicated on changes in order flow. Thus, if the sell program are dominating order flow and the market is going up, well, then extra supply of contracts put into order flow by the sell programs is going to cease the market from going up...and you can guess what will happen next. We have built a bunch of algorithms that monitor order flow and surface this information in real-time, and for free. You can check this free, real-time order flow monitoring service for the STOXX 50 here: WOW Index STOXX 50 Hope this helps.
Interesting but what's different in your product from the established flow apps like Footprint from www.marketdelta.com or CQG's Tradeflow? http://www.cqg.com/Docs/IntrotoTradeFlow.pdf