I changed my order on my Facebook Puts ten times before the Market Open. I put my Options on the Sept 18, 2015 $85 Puts at $8.00 and adjusted them all the way to the Open. If I had kept them at $8 they would have gotten filled there because some options were opening sooner than others. If you used Bats instead of Citadel or CBOE your orders could have fried you. Look at some of the Apple long-dated Calls getting sold for $.20 and the Nov $95 for $.01, if that's not a error, I don't know what is! Enough, by waiting until second before the Open, I got $15.00 instead of $8 which those idiots would have filled me at! Same with CVX and a few Apple Puts, I waited until they walked these down at the last second to place my order, they got filled almost correctly. Use my example to learn from, if I had not changed my order I would have lost $25k, a lesson you need to follow!
You see those Sept $85s at $15.50, that's Citadel doing their job correctly! Please watch your orders or they will scalp you, also it's a great time to try to slam and dunk, shorting the Stock and buying Puts at deep discounts like this is how I use to make free money until the HFTS Boys robbed me of that method!