Homosexuality is most commonly related to past life activities and karma. This is the reason that homosexuality seems to be more of a choice for some than others. I'm sure there are some astrological indications, but I don't know them. It seems to me that you could predict persuasions and likelihoods from a chart, but you cannot predict choices. Some people will obviously have an homosexual persuasion, while others may or may not, depending on their choices.