How to measure compatibility?

I started reading more about starsigns and the astro charts. Started analyzing my relationships with family, close friends and ex bfs and seeing the good and bad parts of each relationship (eg: communication, emotional connection, response in life situations.. etc)The way I try to find this out in a simple way (so far) is through matching our rising sun(personality), sun(nature), moon(emotions), mercury(communication), mars and venus(approach to love and expression; by seeing if a man's mars is compatible with my venus, and if a woman's venus is compatible with mine)

Also I find those compatible together are: fire&air, air&earth, water&earth, earth&earth(especially when communication is concerned), water&water(especially when both moon signs are water)(other combinations like fire&fire or earth&fire always have nonsolvable troubles in one way or the other)

I need you to let me know how you measure it? and if the way I'm observing it is right?

I am new to this so no attacks please

Note: I find that if u dont know a person's time of birth, u cannot know his rising sun. It is way different when I add the birth time!

Posted by Curiousram
http://www.alwaysastrology.com/love-compatibility-calculator.html shows the compatibility % of how smooth the relationship would be. Also http://astro.cafeastrology.com/ has an aspect chart but the comments are a bit redundant but you get an idea. It doesn't factor in the time of birth though which excludes rising so I'm not sure how it works but i got 95% smooth with a Taurus and 65% with another Aries.

Thanks for sharing that!