Doubtful, would require real time data plus possibly paying exchagne fees. I know the MOC imbalances show up on Reuter's but you have to pay for that as well. This may be of interest however. Scroll to bottom of this page: www.stocktrading.com/Tradinginfo.htm Don
If let's say a good X % is traded via X software ... and the Stops are managed at the Gateway level (that is resident at broker site aside XXXNet-- but who's knows what that software trasmits back to X software house), would it be possible that X software house can collect those positions and feed some accounts with good information (order flow) about where the stops are?!... just an hypothesis.