Astrolium's Multi-Wheel puts natal, progressed, solar arc and transit positions on the same houses and then answers the question a stack of rings raises: where do the techniques agree? It is included with the $11 per month Pro plan; see pricing.
Each ring has a dedicated module behind it. For transits on their own, see transits. For secondary progressions and arcs in depth, see progressions. The anchor for every ring is the natal chart.
What convergence synthesis means
One technique alone gives a lot of noise. A transiting outer planet squares something in most charts most of the year. A progressed Moon changes sign every two and a half years or so. The contacts that carry a period are usually the ones confirmed from two directions: a secondary progression and a transit landing on the same natal planet in the same window.
The module is built for finding those.
The ring stack
Natal is locked on. The outer rings follow a fixed order, techniques closest to the birth chart and the live sky outermost: progressed, solar arc, solar return, lunar return, transits. You toggle rings; you do not reorder them.
The cap is three outer rings. With three on, the remaining toggles are disabled and carry the reason. A four-ring view already asks a lot of the eye, and five would bury the natal chart it exists to read.
Progressed and Transits are on when the module opens. That pairing is the most common one in consultation work, and it is the smallest setup that can produce a convergence at all. With only one moving ring, the panel asks you to add a second.
A stamp bar across the top reports the current state: how many rings are active, the client's age and the arc in degrees with its direction type, the transit moment, and the zodiac the natal chart uses.
Convergence, then contacts
The Convergence panel is the first thing to read. Each entry names a natal point, its house, and the techniques hitting it, with the count shown as two techniques or three techniques. Ask AI on an entry sends that exact set of contacts and asks how to counsel around it.
Below it, the cross-ring contacts table carries the detail: technique, moving point, aspect, natal point, orb. It shows the tightest 40 and states the total. A tense or harmonious filter narrows the table and the chords on the wheel. Convergence stays on the full set, because it records what two techniques confirm, and a tone filter should not quietly remove a confirmation.
When nothing converges within the orb, the panel says so and suggests widening the orb, adding a ring or stepping the year or date.
Aspect layers
Drawing every aspect between every ring is how multi-wheels become unreadable. Astrolium splits them into named layers: natal aspects, each ring's own aspects, and each moving ring to natal. Progressed to transits is not a layer, since that pairing is not the contact a timing reading rests on.
Any layer can be shown alone. Show only Transits to natal, and the wheel and inspector drop everything else. The positions are already calculated, so switching layers does not trigger a new request.
Moving through time
Two controls, because the rings move on different clocks. The year stepper drives the progressed and solar arc rings, anchored at mid-year. The transit date drives transits and the two return rings, with previous and next month buttons either side of a date field. Moving the transit date into a new year moves the year stepper with it.
Click a point, follow it across the rings
Select any point on the wheel and a panel shows its sign, house and what activates it. A second table tracks the same body in each layer, with the travel from its natal place. From there, Open in Transits or Open in Progressions takes you into the full module for that technique with the same client.
Frame, houses and place
The house system can be overridden for this chart alone, from Placidus, Whole Sign, Equal from the Ascendant, Koch, Porphyry, Campanus, Regiomontanus and Topocentric, without touching your global settings.
Chart location offers Birth, Current or Custom. Choosing another place recasts the natal frame's angles and houses; planet longitudes do not change. So a transit to the relocated Ascendant shows up where it should. Solar and lunar return rings, when on, are cast at that place too.
Ask AI and reports
The Synthesise button asks Sky to weave the active rings into one timing narrative, using the strongest contacts and the top convergences. It waits until every selected ring is ready. Every point and contact in the wheel inspector also carries Ask AI, and those prompts name which technique each side belongs to so the layers are not blended into one voice. The prompts address the client by first name only. More on the assistant in AI assistant.
For a client deliverable, the reports menu opens Built-In Reports, a multi-page Astrolium-branded PDF, or Report Studio, where the Timing Synthesis template turns the multi-wheel into a seven-page report led by convergence.
Cross-link
For the progressed chart as a standalone calculation, try the progressed chart calculator. For the directed ring on its own, see solar arc directions. For the theory behind the inner ring, read the secondary progressions guide. For the return rings, see solar return and lunar return. For the scanner that dates transits ahead, see predictive timing.