IN order to do an astrological evaluation for compatibility . .one that is VALID and that WORKS, first you have to get the birthdata for both of you:
(1) day, mo, yr of birth
(2) EXACT time of birth (don't use a time rounded off to the nearest hour/half-hour. Even just being off by as little as 4 minutes from the real time of birth can give you answers that don't work out)
(3) birthplace: city, town (the astrological software program will convert it into longitude/latitude for you)
That is the problem with astrology .. finding an accurate birthtime. The more you are "off" from the time of birth, the more you are just guessing, and probably guessing wrong.
Then go to astrowin.org and choose their "free synastry report". Enter the birthdata for both of you, and you get a 10+ page report of all the ways you two get along and all the ways you don't.
Because, whether you are talking to a psychology or an astrologer, NO couple is ever "compatible". ALL relationships have problems and discord and hurt once the honeymoon phase has died out. It is only a matter of HOW much or how LITTLE hurt there is.
And what makes it work is NOT love - love is only 11% of what makes it work.
Nor is it some mysterious concept of "compatibility".
What makes it work is at once dishearteningly difficult, yet very hopeful because we CAN control it.
What makes love work is that we recognize that WE are the one who create our emotional responses. And so we learn to work with our emotions in such a way that things stop bothering us. Only then can we accept our partner AS THEY ARE, and love them for who they are. Until then, once the problem start, we are too consumed with OUR hurt and we try to blackmail our partner through tears or punishment or threats, to try to make them change so that we won't have to deal with our emotions.
Marriages is THE hardest thing you will ever do. Only 12.5% of all marriages learn it, and it takes THEM 15-20 years to figure it out.
Too many couples mourn the loss of the infatuation/fantasy "high" and break up once the going gets tough. They never GET to the place of love.
So, astrology cannot predict if you two will grow up enough to make love work. But it CAN tell you what problems might break the two of you up. Understanding why and how these conflicts arise helps us accept them better and can help us stop fighting with out partner .. compassion for our partner always helps resolve our own emotional upset.
But sign comparison? NO real astrologer compares signs because it doesn't work.
In astrology, it is the distances between planets, NOT the signs, that indicate HOW those planets interact. These distances are called "aspects" and only CERTAIN distances create an interaction .. depending on which distance it is, that interaction is either harmonious or it is discordant.
But since signs are 3 times as wide as the allowable distance, you cannot use signs to find these distances.
For instance ... you have Sun in Cancer. He has Scorpio Rising.
Depending on the actual DEGREE/location/position within the 30-degree-wide sign of Cancer .. and the same for his Ascendant ....
your Sun and his Ascendant have the following possible aspects:
(1) Your Sun is trine his Ascendant .. a harmonious distance of between 112 and 128 degrees
(2) Your Sun is square his Asc. ... a discordant distance of between 82 and 98 degrees.
(3) NO aspect = NO interaction between your Sun-need and his Asc-behaviors.