rcreal posts what I think is the main difference between an investor and a trader. The investor has an interest in the growth of the company based on the fundamentals of that company. It is a mindset. The investor's concern for technical analysis is minimal.
CANSLIM participants use a rigorous fundamental filter combined with technical buy points. They do not short. Yet most of the exit strategies for CANSLIM participants are based on ideas other than changes in the fundamentals. Thus, I would call them traders and not investors.
Marketsurfer makes a brief but cogent point... time. Again, however I think it reverts back to the reason for the purchase of the stock. An investor buys because of his belief in the long term growth of the company, regadless of the technical picture, while a trader might be on for the long term... as long as the stock is above the 200 day sma.
Hey, maybe the difference is the investor uses fundamental analysis primarily with an open-ended time frame in mind, while a trader use technical analysis primarily with a closed-ended time frame.