i just compared these two pictures and noticed a little something:
Picture 1: 2 day closing price on mtgoxUSD,
5-min intervalPicture 2: 2 day closing price on mtgoxUSD,
15-min intervalnotice, in the
5-min interval picture you see a 5.5k dump at 12:00pm, but in the
15-min interval it is shown as a 5.5k buy.