I certainly hope that you hide your size and show only a few hundred shares instead of posting a "100". While size might not move QQQ's, tape reading often henges upon "presuming" that size like that means MM's or other hidden size-traders. If 10,000 shares in QQQ's represents your total turnaround average shares, then perhaps you should tune into the other "scalpers" and see their methods, and whether these can be adapted to your style.