Does this apply to buying a house or a car?

Yes — anything where you sign terms and are bound by them. The reading is about the act of committing in writing rather than about what is being bought.

What if I cannot move the completion date?

Then use it on the hour, and on the reading itself: knowing a day is poor changes how carefully you read the document, even when it cannot change the date.

Is Mercury retrograde really that important?

It is weighted as the most significant negative factor for this occasion, which reflects the tradition rather than any demonstrated effect. Treat it as this system’s strongest signal, not as a prediction.

Does this replace legal advice?

No, and nothing here should be read that way. It says nothing about the terms themselves — only about when tradition considers the timing favourable.

Best day for

The best day to sign or negotiate

Terms you sign are terms you are held to. This ranks the days ahead against your own chart, names the strongest hour, and is unambiguous about the periods this tradition says not to sign in.

Check a day, free

Wording, and what endures

Signing is the most Mercurial act on this site. Mercury is weighted at the top of its range here — the same weight Venus carries for a wedding — because a contract is words that will be read again later by people looking for advantage. Saturn is weighted as a positive, since you want the structure to hold, and Jupiter for terms that turn out generous rather than merely survivable.

Your own Mercury and Midheaven matter most among chart points: how clearly you express things, and what you are professionally committing.

Mercury retrograde is close to disqualifying

Every tradition that says anything about this says the same thing, and the scoring follows it: Mercury retrograde carries the heaviest penalty this system applies to anything, level with Venus retrograde for a wedding. Misread clauses, terms that meant something different than you thought, the amendment nobody circulated.

Mercury is retrograde for about three weeks, three or four times a year. Knowing which weeks those are is arguably the single most useful thing on this page, and a free check will tell you for any day you name.

The deadline usually wins

Contracts have dates driven by other people. If completion is Friday, it is Friday. What remains available is the hour, and often a choice between a few days at the end of a process — which is where this is worth consulting.

The limit, stated plainly: nothing here reads the contract. A well-timed signature on bad terms is still bad terms, and no arrangement of planets substitutes for a lawyer.

What the scoring weighs for negotiation or signing

Terms you will be held to. Mercury for the wording, Saturn for what endures, Jupiter for a generous outcome. Mercury retrograde is disqualifying.

Planets that matter most

☿ Mercury×1.6
♃ Jupiter×1.2
♄ Saturn×1
☉ Sun×1
♀ Venus×0.9

Points in your chart

☿ Mercury×1.5
MC Midheaven×1.1
♃ Jupiter×1.1
☉ Sun×1

A favoured day or planetary hour ruled by ☿ Mercury, ♃ Jupiter, ♄ Saturn adds a little more. The numbers are multipliers on each aspect found, not a score out of ten — they decide what counts, not what the answer is.

What it warns you about

Mercury retrograde
The heaviest penalty applied anywhere in this scoring. Traditionally the clearest prohibition in the whole subject: do not sign what you have not re-read.
A void-of-course Moon
Penalised firmly. The Moon has perfected its last aspect before changing sign, and agreements begun under it are held to come to nothing — which for a contract means a deal that quietly fails to complete.
Hard contacts to your Mercury
The chart point most heavily weighted for this occasion. A tense transit to it is a poor day to be relied upon for precision.

Check a day for negotiation or signing

One day at a time is free and holds nothing back. Your birth details are used to calculate your chart and are never stored. A pass searches a range and ranks every day in it.

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What are you planning?

Terms you will be held to. Mercury for the wording, Saturn for what endures, Jupiter for a generous outcome. Mercury retrograde is disqualifying.

About you

Used to build your birth chart. Calculated, returned, and never stored.

Date of birth

Time of birth

Local clock time where you were born. If unknown, 12:00 is the usual stand-in — the Moon and the angles lose precision.

Place of birth

Needed for your Ascendant and Midheaven.

When might it happen?

Which day are you considering?

Where will it happen? (optional)

Only worth setting if the event is in a different time zone from your birth place — it decides which local hours are scored, and the planetary hours from local sunrise.

Checking one day is free, in full — every aspect, the best hour, any warnings. A pass searches up to a full year and ranks every day.

Questions

Does this apply to buying a house or a car?: Yes — anything where you sign terms and are bound by them. The reading is about the act of committing in writing rather than about what is being bought.
What if I cannot move the completion date?: Then use it on the hour, and on the reading itself: knowing a day is poor changes how carefully you read the document, even when it cannot change the date.
Is Mercury retrograde really that important?: It is weighted as the most significant negative factor for this occasion, which reflects the tradition rather than any demonstrated effect. Treat it as this system’s strongest signal, not as a prediction.
Does this replace legal advice?: No, and nothing here should be read that way. It says nothing about the terms themselves — only about when tradition considers the timing favourable.