I suppose that because it's on an uptrend people are wanting it to soar in the last minutes, on the other hand when it's down people are hoping power hour will break it even. In my opinion a lot of trades are made at 930 on the dot because some platforms don't let you trade until then and that any stock that has been pumped will sell at market price to dump them. Then there is lunch time,most people like myself do have a regular job and can't look at it in the early morning and will either buy or sell depending on their position. The so called power hour is pretty much the same as lunch time