Is there a level 2 for stock index futures like there is for Nasdaq stock trading? I know there is a DOM(depth of market) window, but it doesnt' show who is buying the 250 contracts that just came across the DOM like it does for Nasdaq. Nasdaq shows us if goldman sachs is the one who is buying. DOM shows us only a time and sales but not "who is buying". is there something similar to nasdaq's level 2?