So I'm thinking of getting in to single stocks for fun, but I will be testing these waters based mostly on my growing knowledge of trend lines. But I'm very confused. I was looking at this website which gave this picture to explain the use of trend lines:

http://www.liberatedstocktrader.com/pics/uptrends-drawing-trendlnes.jpg

Its very easy to look at historical trends and say, "Yes, I would/should have gotten in there and gotten out there." But how does one make a decision today based on trend lines? The only thing I've been able to come up with is using a moving average trend, say 100 days. And then I would buy if the stock was up a certain percentage from the trend line, then sell when it breaks the trend line by a certain percentage.


Can anyone steer me in the right direction?