Okay say you want to get out of a stock. You have 2 options either to hit the bid or place an offer and hope you get a fill. A factor of this decision is where you are in line. If you can get to the first spot you might as well try to sell on the offer, however if you are dead last you probably wanna just hit the bid. So say it is 20.25 * 20.26 Your automated program places a sell limit order @ .26, and as soon as the offer decreases say to .25 your automated program will cancel and replace a new sell limit order @ .25. ~so the guy whose program can do this the fastest has a very big edge. Can I think that my compiled run automated trading system can shoot an order fast enough to be in the front of the line for it to be worth trying to sell on the offer or are the BIG instituations able to purchase THE FASTEST order routing systems that their orders will always be their first, and you'll be stuck at the back of the line?