Fire Signs

Fire is compatible with fire and air, apart from the opposite pairs which you can find easily in a horoscope.
These are Aries-Libra, Leo-Aquarius, and Sagittarius-Gemini.
There can be a powerful first attraction between the opposite signs, but after a while, they each have to admit that they are not so compatible after all.
Aries are quick to make decisions, but it can be hard for Libra to make a decision and the tension between them can cause friction.
Leo is a fire sign, Aquarius is an air sign, but they are both fixed signs and have set opinions about their beliefs.
Sagittarius a fire sign and Gemini an air sign.
They can be attracted to each other, but also repel.
Fire does not combine readily with water or with earth signs.