Explore Your Options by Tom Gentile
WHO'S GETTING FILLED?
Why do my option orders get filled easily at times when placed between the bid and offer, but other times the market makers change the quote to reflect my bid or offer?
Getting a fill on a placed bid or offer versus your order remaining unfilled is generally due to a couple of key factors.
The first dynamic involves sizing up the liquidity in the product youíre attempting to get a position in. Liquidity provision should take trading volume into account. The more the merrier, as they say. Second, if a stock or index doesnít average thousands of contracts daily, itís a good idea to look at a few daysí worth of contract volume and the individual prints representing that activity.