Well, following the conservative advise on other threads, maybe Satrix? You then dont have to worry about the signals just what to do with the divs.....other than that only you can generate those signals with a system you develop that matches your risk management, reward/profit needs and emotional numbness.
Have you tried reading up on some great books like
Trade your way to Financial Freedom by Van K Tharp and
Trading in the Zone by Mark Douglas ?
These will help with most of your entry/exit problems.
What I have learned, is it matters what exit stratergy you use (you have pre-determined this before you enter/decided to buy shares/positions). Exit is critical, but entry and time of entry are equally if not slightly more important. Get the timing wrong on entry and your exit is stuffed before you even begin. and Simon is going to add risk management. How much are you willing to loose in that trade? Get these three points correct and you should win 60% plus of your trades (not not 60 in a row just 60 out of 100) and with the right risk/money management you can make profits.