Compatibility readings: how two people fit, and how today sits between them

Compatibility is not a percentage. Two charts meet in specific places — her Moon on your Saturn, his day master fed by your elements — and each meeting is a thing that will happen between you, repeatedly, with a shape you can name. Lumia reads the meetings in both systems and adds the part most compatibility readings leave out: what the current day does to the pair.

The Western reading: synastry

Synastry lays one chart over the other and reads the aspects between them. Venus to Moon is ease and affection; Sun to Saturn is weight and commitment, or being judged; Mars to Mars is desire, or fights. The seventh houses say what each of you is looking for and whether the other is it. Lumia writes where you run alike, where you pull, and what the pulling is actually about.

The BaZi reading: supply

The BaZi side asks whether the other person’s elements supply what your chart is short of, or add to what you already have too much of. A weak fire day master with a wood-rich partner is fed; with a water-rich partner is dampened. The day branches meet too — some combine, some clash — and a clash is a known pattern of recurring argument, named in advance. BaZi compatibility.

Today between you

Your compatibility does not change. The day does. Each morning’s transits touch each chart differently, and the reading ends with today’s weather for the pair: a day that favours one of you, a day to make a decision together, a day to give each other room. This is the part people come back for.

Different relationships, different weights

RelationshipWestern emphasisBaZi emphasis
PartnerVenus, Moon, 7th house, MarsDay branch, element supply
FriendSun, Mercury, 11th housePeers and output elements
FamilyMoon, 4th house, SaturnMonth pillar, resource element
Work partnerSaturn, Mars, 10th and 6th housesWealth and authority elements

A worked example

Her Saturn sits on his Sun. Synastry: she is the serious one and he feels judged, and also steadied. BaZi: he is a strong wood day master, she is metal-heavy — metal controls wood, so she cuts him to shape, which he needs and resents. Today: the Moon is on his Venus and the day’s element is water, which feeds wood. A good day for him to hear the hard thing. That is a compatibility reading.

Frequently asked questions

How does Lumia compatibility work?

You add a person with their birth date, and time and city if you have them. Lumia casts their chart and reads it against yours in two systems: Western synastry for how you love and fight, and BaZi for whether your elements supply each other. The reading ends with what today does to the pair.

Is compatibility only for romantic partners?

No. Add a friend, a parent, a co-founder. The reading weighs different parts of the charts for different relationships and says so.

Do I need their birth time?

No. The date gives most of the reading. The time adds their Ascendant and houses on the Western side and the hour pillar on the BaZi side, which sharpens it.

Is it free?

Adding people and seeing both charts is free. The written compatibility reading is Premium, $8.99 a month with a free first week.

See your own chart

Lumia casts your birth chart from your date, time and city and reads it in plain language. The chart and its reading are free; BaZi, compatibility and the deeper tarot spreads are Premium at $8.99 a month, first week free.

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