Compatibility · Water & water
Two dreamers, one boat?
Are two Pisces compatible?
Two Pisces are the same sign twice: water meeting water, mutable meeting mutable. Astrologers call it a mirror, and Ptolemy counted it as a conjunction. But that compares two Suns and nothing else. Venus, Mars, the Moon and the descendant decide how it actually feels.
You're here because of someone.
The Sun signs say you’re the same. Two whole charts say far more.
Your card is worked out from the day, the minute and the place you were born, not from a sign you share with a twelfth of the planet.
Every Pisces reads this page. Only your card knows you.
Find out your true compatibility.
What it is: synastry, the art of comparing two charts
Comparing two people's charts has a name: synastry. Astrologers lay one chart over the other and look at the angles between the two sets of planets, the same angles the old books use inside a single chart.
Sun-sign compatibility is the shortcut version. It compares only the two Suns, and the angle between them is the aspect: four signs apart is a trine, two apart a sextile, three apart a square, six apart an opposition. Ptolemy called the trine and the sextile harmonious, and the square and the opposition disharmonious. 1
Elements describe temperament (fire, earth, air, water) and modes describe pace (cardinal starts, fixed holds, mutable adapts). Two Piscess share both: water and mutable, twice.
Full synastry goes much further: whose Venus lands on whose Moon, where one person's planets fall in the other's houses, how the two descendants line up. Ptolemy himself compared the Sun and the Moon of both charts, not just the Suns. That is why one Pisces can get on beautifully with another Pisces and not at all with a third. 2
What happens when two Pisces fall for each other?
The traditional portrait: the same for every Pisces.
Pisces in love
Pisces loves like a song you can't get out of your head, in the old books: romantic, devoted, and ready to see the best in someone long after the evidence runs out. Traditionally a Pisces gives everything and needs gentleness back. The fish can drift, the story goes, but it always swims toward kindness.
Together
Water with water. Astrologers say these two feel the mood in the car before anyone's said a word. Deep end, both of you. Who remembers to come up for air?
Both mutable: two people who bend. Easy company, the old books say. Picking a restaurant, though, could take all night.
The most romantic and least organised pair on the wheel. Jupiter, the old planet of generosity, belongs to them both, and both are mutable water: soft, intuitive and usually a little late. Tradition gives them a world of their own. Someone still has to pay the electric bill.
Where it comes from: comparing charts, from Babylon to your phone
Era by era, with sources. More in the Reading Room.
- Ancientc. 450 BCEThe Babylonian zodiac settles into twelve equal zones, the frame later comparisons of signs are built on. 3
- Ancient410 BCEThe earliest known horoscopes, from Babylon and Nippur, date to this year. 3
- Classical2nd century CEPtolemy's Tetrabiblos names the aspects between signs and calls the trine and sextile harmonious, the square and opposition disharmonious. 4,1
- Classical2nd century CEPtolemy's triangles: Pisces belongs to the water triangle, which he puts under Mars, with Venus by day and the Moon by night as partners. Two Pisces share the triangle, the planet (Jupiter) and the season: everything his system counts. 1
- Classical2nd century CEIn his chapter on marriage, Ptolemy compares two charts: the Sun and Moon of one against the Sun and Moon of the other, reading trines and sextiles between them as concord and squares and oppositions as friction. 2
- Classical2nd century CEHis chapter on friends and enemies does the same with the Sun, the Moon, the rising degree and the Lot of Fortune of both people. 2
- Medieval12th centuryAbu Ma'shar's introduction to astrology circulates in Latin; the University of Edinburgh holds a 12th-century copy. 5
- 1800s1890Alan Leo's Astrologer's Magazine offers its annual subscribers a free horoscope by post. 6
- 1930s1937R. H. Naylor's newspaper horoscope, begun in 1930, is organised by the twelve sun signs. 7
- 1970s1978Linda Goodman's Love Signs is published by Harper & Row. 8
- 1980s–90s1980–1999Chart services run by computer arrive: Astrodienst in Zürich sells birth charts from 1980 and goes online in 1996. 9
- Today202430% of US adults consult astrology, tarot or a fortune teller at least yearly, mostly for fun, according to Pew Research Center. 10
Worked out, not guessed
- A sign paired with itself shares everything: element, mode and polarity. There are 12 such pairs among the 78 possible sun-sign pairings.
- Venus never gets more than about 47° from the Sun, so a Pisces's Venus is in one of five signs (Capricorn, Aquarius, Pisces, Aries or Taurus). Which one is a matter of the year and the day.
Why does it feel like you’re both drifting?
The Sun can’t answer that. These four can, and your card reads every one of them.
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Venus · how you love
How do you love, and how do you want to be loved?
That's Venus. It never strays far from the Sun, so a Pisces's Venus can only sit in Capricorn, Aquarius, Pisces, Aries or Taurus. Two people with the same sun sign can want completely different evenings.
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Mars · what you want
Why does nobody steer?
That's Mars: desire, temper, the way you chase what you're after. It can sit in any of the twelve signs, so two Pisces born a season apart can want, and fight about, completely different things.
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The Moon · what you need
Why do they feel like home one day and a stranger the next?
That's the Moon: what you need when the door's shut and the day's gone wrong. It changes sign every two and a half days. If their Moon falls in your sign… well.
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The descendant · who you’re drawn to
Why do you keep falling for the same type?
That's your descendant, the edge of the seventh house: the sign setting in the west at your birth minute. Tradition reads it as the partner you keep noticing. It needs your birth time and place.
Every Pisces reads this page. Only your card knows you.
Your card is worked out from the day, the minute and the place you were born. This is what it covers, love chart included.
Sources
- Ptolemy, Tetrabiblos, Book I, chapters 10–19 (aspects, houses of the planets, triplicities), LacusCurtius, University of Chicago (Loeb Classical Library translation by F. E. Robbins, 1940). Read on .
- Ptolemy, Tetrabiblos, Book IV, chapters 5–7 (Of Marriage; Of Children; Of Friends and Enemies), LacusCurtius, University of Chicago (Loeb Classical Library translation by F. E. Robbins, 1940). Read on .
- Review of Francesca Rochberg, The Heavenly Writing: Divination, Horoscopy, and Astronomy in Mesopotamian Culture (reviewed by Eleanor Robson), BMCR 2005.06.29, Bryn Mawr Classical Review. Read on .
- Ptolemy (by Alexander Raymond Jones), Encyclopaedia Britannica. Read on .
- 'Dicta Albumassar' by Abu Ma'shar, a Latin version of his Introduction to Astrology, 12th century, University of Edinburgh Archives and Manuscript Collections. Read on .
- The Life and Work of Alan Leo, Theosophist, Astrologer, Mason, Internet Archive (digitised book: Bessie Leo and others, London, 1919). Read on .
- How Are Horoscopes Still a Thing? (Linda Rodriguez McRobbie), Smithsonian Magazine. Read on .
- Linda Goodman's Love Signs (first published 1978, Harper & Row), Open Library (Internet Archive) catalogue record. Read on .
- About Astrodienst, Astrodienst AG (company history). Read on .
- 30% of Americans Consult Astrology, Tarot Cards or Fortune Tellers, Pew Research Center, 21 May 2025 (Chip Rotolo). Read on .





