Every move in them on a 3 minute chart, or sometimes even a 1 minute chart. Every tick in the sp and nas futures, will have a corresponding move in the largest cap stox, especially the tech ones. So if hte nas futs go up 10 pts really fast, you can expect mu to go up a dime, maybe 20c. That's what you're then looking to take if you were playing mu on the futs movement. Even though mu isn't a nas stock, it will move with them more than the sp's just cause it's a tech, and in the sox, but I could have used the example of amd, mu, mot, aol, emc, txn, hwp, ibm,nok, nt, lu, cpq, gtw, glw, nsm etc. That's just the tech ones, most other stox will move with the futs also, but a wmt, won't move as fast, cause there aren't as many trader types looking for the next quarter point. That's why I prefer the tech ones, and a few nontech names for this type of thing just b/c I know I can put them out quickly on island. I don't play this strategy all that often honestly, just b/c I think there are better opportunities out there than fighting for dimes. But if you wanna swing 5k at a time. It's usually worth it if you can catch that .15 or so if the specialist is slow.