friday's trading, page-112

Maybe its not a DB but a tweezer bottom?

"A tweezer bottom occurs when the price holds twice at the exact price. The time frame can be on two consecutive days or up to around eight, any more than this and you would be looking at a double bottom formation. This formation is significant because twice in a short period of time sellers were unable to push the stock lower. Therefore, tweezers basically signify a very short-term support level."

http://www.shareselect.com.au/knowledge-bank/Technical-Analysis/Tweezer-Bottoms/