Thank you.
I knew Freepers would have the answer.
A stock can go up on light volume because there are EXTREMELY few motivated sellers. So, a few buyers make the stock move higher, because every ask side order is wiped out quickly without any depth.
Use a mirror for the opposite. Light volume driving a stock down is a simple issue of very few willing new buyers.
Really, the whole thing is very rubik's cube (sp)unless you're a professional. A good reason why I cringe when I hear about people that are going to do it on their own. Granted, some of the other pro's I know, make me cringe too!