As a daytrader, I still wonder how others like me trade big up/down market opens, like we've seen lately, when there are gap ups or downs. I personally try to go with the market and look for those issues whose sector-mates are having big moves and find those that arent too far from previous close and take those. How do you guys trade it? or do you wait for the market to settle down first? As a follow up, on days when there are big ups/downs in open how do you get to estimate the opening price so you'll get done. As I said I try to get those close to previous open although sometimes someone will suddenly push up/down the price at open and some of my orders left unfilled, causing me to miss it. What's a good way to estimate it and get a fill at opens?