For December 21, tech giant Oracle missed some pivotal earnings numbers which caused worry in the tech sector. These worries hurt the tech sector as a whole which put a further drag on the market. RIMM did very well today despite the negative tech sentiment on buyout rumors as it soared over 10%.. The Dow during the the day was down by as much as a hundred points but recovered to close in the green. GE and other strong Dow components countered the move on tech which allowed for a midday rally. Spotting reversals is key to understand how to get long at the right time which can occur if one understands key technical analysis principles.