Thanks for the link, I like to read about this stuff now and then. For trading, keeping to price and volume alone works for me. Sometimes I get curious about what might be going on (like yesterday), but I don't trade off of it. I think today was a great example. I had no idea about this report. I ended up with a loss on the trade of -1, even though there was a violent unexpected turn in the price. It is just like the losses on most of my losing trades. I held it overnight because it was already pretty profitable and I figured there was ~90% chance to get to 340 before coming back. Good trading protects me. More importantly, it protects me from unexpected violent moves just as well, for which there is no preplanned announcement. And it sure is good when the violent moves go my way. Of the three professional traders I know, all three of them don't use this rule of staying out during announcements. I am sure there are other pros who do stay out as a rule. It is just a trading technique, one way or the other. I don't think it should be posited as a rule one must follow.