Astrology is not one method. It is a family of languages spoken about the same sky. A single chart can be read as a portrait of character, a calendar of events, a map of choice, or a diagram of a relationship. The most common error begins before any calculation: a technique is chosen because it is familiar, not because it fits the question. A natal chart cannot tell you whether Thursday's interview will go well. A horary chart cannot describe how someone experiences middle age. A transit cannot substitute for the promise of the natal chart.
This article is a navigator, not a textbook. It maps the terrain: what each method asks, what time scale it works on, what data it needs, where it is strong, and where its competence ends. It closes with a decision table, a protocol for combining methods, a worked example, common mistakes and a checklist.
One principle governs everything below: a method does not improve the quality of its data. If the birth time is uncertain by an hour, precise directions and exact returns do not become reliable because the formula is more elaborate. The accuracy of the input is the ceiling of the method, not its decoration.
1. Three questions that choose the method
1.1. What kind of question is it?
The question determines the family of methods. Description uses the natal chart and static lenses; forecast uses time techniques; choice uses electional astrology, horary or planetary hours; relationship uses synastry and composites; place uses astrocartography; collective uses mundane charts; health uses medical astrology; data uses rectification.
Keep "whether" and "when" apart. If the decision is made and only a date is needed, the task is electional. If the question concerns a fact that has not yet occurred, it is horary. If context is needed, start with the natal chart and the slow layers of time.
1.2. What is the time horizon?
| Horizon | Suitable methods |
|---|---|
| Moment | Horary, planetary hours |
| Day | Moon transits, planetary hours, daily profections |
| Month | Lunar return, monthly profections, fast transits |
| Year | Solar return, annual profections, Jupiter and Saturn transits |
| 2–10 years | Progressions, solar arcs, firdaria, decennials, zodiacal releasing sub-periods |
| 10–30 years | Major zodiacal releasing periods, firdaria, Saturn returns |
| A lifetime | Natal chart, zodiacal releasing, harmonics, draconic chart |
The horizon also sets the language. At the scale of a day, speak of background and probability. At the scale of a decade, speak of chapters and strategy.
1.3. What data is available?
The accuracy of the birth time is a tolerance for error, not a formality. Four minutes shift the Midheaven by roughly one degree. In primary directions, where a degree is often taken as a year, four minutes of error can shift an event by about a year. In astrocartography, the same four minutes move a line by tens of kilometres.
| Time accuracy | What is admissible | What is unreliable |
|---|---|---|
| Date only | Planets in signs, aspects between them (except the Moon), harmonics, draconic chart without houses | Houses, angles, returns, profections, directions, zodiacal releasing, astrocartography |
| ±2 hours | Rough houses, the Ascendant sign with a caveat, the solar return date without houses | Exact angles, directions, rectification |
| ±30 minutes | Houses and angles approximately; profections if the Ascendant is not near a cusp | Primary directions, exact returns, astrocartography |
| ±10 minutes | Houses, solar return, progressions, most transits | Directions to the month, rectification |
| ±1–2 minutes | Directions, exact returns, astrocartography, rectification | The remaining uncertainty of the method itself |
Check historical time zones, daylight-saving changes and calendar reforms. An hour of error looks like a methodological error but is an input error. "Around six in the morning" is a range, not "06:00".
2. Five families of methods
| Family | What it does | Time span | Methods |
|---|---|---|---|
| Static description | Reads the structure of the chart | A lifetime | Natal chart, midpoints, fixed stars, harmonics, draconic chart |
| Dynamics of time | Places time over the natal chart | Days to decades | Transits, progressions, directions, returns, profections, firdaria, decennials, zodiacal releasing |
| Event charts | Casts a chart for a moment or a question | A moment to a year | Horary, electional, mundane, medical |
| Relationship and place | Compares charts or anchors them to geography | Months to a lifetime | Synastry, composite, Davison, astrocartography |
| Auxiliary | Refines data and fine timing | Minutes to years | Planetary hours, rectification |
The boundaries are porous: a transit to a midpoint is both dynamic and static; a decumbiture chart is both an event chart and a forecast. The label matters less than the question.
3. Passports of the methods
3.1. Natal analysis
Answers. Personality structure, resources, vulnerabilities and themes of fulfilment; potential, not events.
Time scale. A lifetime; layers unfold at different speeds.
Data. Date, time and place; time for houses, angles and the ruler.
Strengths. The foundation of every method and the address for transits and directions.
Limits. No event prediction; house-system dependent; without synthesis it is an inventory.
3.2. Transits
Answers. What is activated now; triggers of natal themes.
Time scale. Hours (the Moon) to years (Pluto); Saturn about 2.5 years per sign.
Data. A natal chart with accurate time, ephemerides, a location.
Strengths. Concrete, testable, good for windows.
Limits. A transit is a condition, not an event; orbs, retrogradation and stations move dates; collective transits do not explain personal choices.
3.3. Secondary progressions
Answers. Inner development and changing needs, the weather of a period.
Time scale. A day equals a year, two hours a month, four minutes a day; the progressed Moon takes about 2.3 years per sign; the progressed Sun moves about 1° a year.
Data. Accurate birth time for the Moon and angles, ephemerides, time zone.
Strengths. Psychological depth and age stages.
Limits. No guaranteed events; angles are time-sensitive; the progressed Moon alone cannot date an event.
3.4. Directions
Answers. Exact turning points: solar arcs for the year's events, primary directions for precision and angles.
Time scale. Years; a solar arc moves all points by the progressed Sun's travel (about 1° a year); in primary directions 1° of rotation is about four minutes, with a key such as 1° or 0.9856° per year.
Data. Birth time to the minute, place, dated events.
Strengths. Sharp dates, testability, a direct link to the angles.
Limits. Four minutes of error can shift a primary direction by about a year; the key changes the date; without rectification the precision is false; solar arcs are not independent of progressions.
3.5. Returns
Answers. Themes of a year (solar return), a month (lunar return) or a long chapter (planetary returns).
Time scale. A year; about 27.3 days; Saturn about 29.5 years, Jupiter about 12, Mars about 1.9.
Data. Exact time and place of the return; for a solar return, where the person is; the natal chart.
Strengths. Solar sets the year, lunar the month, planetary returns long chapters.
Limits. A solar return does not list events; houses depend on the system; lunar returns accumulate noise.
3.6. Profections
Answers. The theme of the year and its time lord; monthly detail.
Time scale. A year per house, a month per sign, about 2.5 days per sign in daily profections.
Data. Ascendant sign, birth date, whole-sign houses.
Strengths. Simple, clear annual theme, good with transits to the time lord.
Limits. A coarse grid; the time lord does not guarantee events; near a cusp the sign may be wrong.
3.7. Firdaria
Answers. Long planetary chapters and sub-chapters.
Time scale. 7–13 years; by day Sun 10, Venus 8, Mercury 13, Moon 9, Saturn 11, Jupiter 12, Mars 7, then nodes 3 and 2; by night start with the Moon.
Data. Sect, date, time for sect.
Strengths. A clear long narrative and changing emphasis.
Limits. Orders and node conventions vary; no exact dates; not independent of decennials.
3.8. Decennials
Answers. An alternative long periodisation: chapters of 129 months with seven sub-periods.
Time scale. 10 years 9 months; the first period begins with the sect light.
Data. Sect, time, date, planetary positions.
Strengths. Finer long-term structure than firdaria.
Limits. More complex and less common; starting schemes vary; not a second independent confirmation.
3.9. Zodiacal releasing
Answers. Chapters of career and action (Spirit) and of body and circumstances (Fortune); turning points and the loosing of the bond.
Time scale. Sign periods of 8–30 years (shortest Taurus and Libra, longest Aquarius and Capricorn); a 211-year cycle.
Data. Accurate time and place for the lots, sect, formula, zodiac; by day Fortune = Ascendant + Moon − Sun, Spirit the reverse.
Strengths. Long-range biography, testable turning points.
Limits. Depends on lots and birth time; formulas and starting points vary.
3.10. Horary
Answers. A specific question with yes, no, when or how; the chart is cast when the question is understood.
Time scale. The moment of the question; timing from signs, the Moon and planets.
Data. Exact time and place, a clear formulation, no repetition.
Strengths. No natal chart needed; specific and testable.
Limits. Requires method and discipline; health and legal questions are symbolic context only; repetition distorts.
3.11. Electional astrology
Answers. The best time to begin an action.
Time scale. Hours to months; a chart for the chosen moment and place.
Data. Place and nature of the event, participants' data, ephemerides.
Strengths. Practical and concrete; produces action.
Limits. No guaranteed outcome; factors compete; ideal dates are rare.
3.12. Mundane astrology
Answers. Collective events, countries, institutions, markets and cycles.
Time scale. Months to centuries; foundation charts, constitutions, elections, eclipses, ingresses.
Data. Accurate event charts, historical data, a chosen national chart.
Strengths. Context and understanding of cycles.
Limits. National chart choice is contested; causation is complex; do not predict specific disasters.
3.13. Medical astrology
Answers. Constitution, vulnerability, onset and course of illness.
Time scale. From onset to recovery; transits and progressions to health significators.
Data. Natal chart, exact time and place of onset, medical information.
Strengths. A symbolic map of vulnerability and timing.
Limits. Does not diagnose or treat; does not replace a doctor; gives no prescriptions.
3.14. Synastry
Answers. How two charts interact: attraction, friction, complementarity.
Time scale. The relationship's duration; the comparison is static.
Data. Both people's data; time for houses and angles.
Strengths. Detailed chemistry, house overlays, cross-aspects.
Limits. Not a verdict; free will matters; overlays are time-sensitive.
3.15. Composite and Davison charts
Answers. The relationship as a third entity; a composite uses midpoints of the charts, a Davison chart the midpoint in time and space.
Time scale. The relationship's life cycle.
Data. Both natal charts; for Davison, exact times and places.
Strengths. A shared chart and themes invisible in synastry.
Limits. A composite is an abstraction; a Davison chart can fall far away; both are descriptive.
3.16. Astrocartography
Answers. Where planets become angular: MC, IC, Ascendant and Descendant lines.
Time scale. Years and a lifetime; expression depends on the natal chart and transits.
Data. Accurate time (four minutes shift the MC by about a degree), birth place, map, relocated chart.
Strengths. A visual world map and concrete lines.
Limits. Lines are not good or bad; the natal chart is still needed; time is critical; culture and economics matter more.
3.17. Harmonics
Answers. Hidden patterns and aspect families: the 4th harmonic emphasises conjunctions, squares and oppositions, the 5th quintiles, the 7th septiles, the 9th noviles.
Time scale. A lifetime; static.
Data. Accurate positions and the harmonic number; houses are usually not used.
Strengths. Research into structure and unconventional aspects.
Limits. Interpretations vary; high risk of fitting; not a forecast.
3.18. Draconic chart
Answers. A developmental narrative and core theme measured from the North Node.
Time scale. A lifetime; static.
Data. Node position (true or mean), time for houses.
Strengths. A different lens and a theme invisible in the tropical chart.
Limits. Speculative; little empirical support; not literal past-life stories.
3.19. Midpoints
Answers. Precise signatures and pictures of three factors.
Time scale. Static; transits to midpoints provide timing.
Data. Accurate positions, an orb of about 1° (1.5° for the Sun and Moon), a 45° or 90° dial.
Strengths. Sharp combinations and compact notation.
Limits. Combinatorial explosion; easy to find confirmation; orb discipline is essential.
3.20. Fixed stars
Answers. Vivid focal points, images, vocational and event signatures.
Time scale. Life; transit triggers.
Data. Accurate positions, ecliptic longitude, an orb of about 1° (up to 2°), precession.
Strengths. Imagery and texture outside the planetary grid.
Limits. Meanings vary; the orb must be tight; risk of fatalism; not standalone.
3.21. Planetary hours
Answers. Fine timing for small actions within a day.
Time scale. 12 day hours from sunrise to sunset and 12 night hours; the first hour is ruled by the day's planet.
Data. Date, place, sunrise and sunset, time zone.
Strengths. Simple and precise within a day; no natal chart needed.
Limits. High latitudes; sunrise calculation; meanings vary; not for long-term prediction.
3.22. Rectification
Answers. The birth time within a window, tested against dated events.
Time scale. Minutes; affects houses, angles, directions, returns, astrocartography.
Data. Time window, place, three to five dated events, a method.
Strengths. Improves the angles and enables exact methods.
Limits. Circularity and overfitting; give a range and confidence level, not one minute.
4. Decision table
| Task | First method | Support | Avoid |
|---|---|---|---|
| Understand a personality | Natal analysis | Midpoints, fixed stars, harmonics | Starting with a transit or a horary |
| Understand the theme of a year | Annual profection | Solar return, firdaria, transits to the time lord | Reading a solar return without the natal chart |
| Find an exact turning point | Primary directions or solar arcs | Transits, progressions, profections | Dating an event from one transit |
| Choose a date for action | Electional astrology | Planetary hours, transits to the natal chart | Ignoring the natal chart and the participants |
| Understand a relationship | Synastry | Composite, Davison, transits to the composite | Passing a verdict from one chart |
| Choose a place to live | Astrocartography | Relocation, natal chart, transits | Treating a line as destiny |
| Examine health and crisis | Medical astrology | Natal chart, transits, progressions | Replacing a doctor or giving prescriptions |
| Understand a collective event | Mundane astrology | Eclipses, ingresses, cycles | Predicting specific disasters |
| Answer a concrete question | Horary | Electional, if action is needed | Repeating the question until the desired answer |
| Build a long-term strategy | Zodiacal releasing, decennials, firdaria | Profections, solar return, transits | Treating a time lord as an event machine |
The practical rule: first the layer that answers the question, then the layer that refines the time, and only then the layer that chooses the moment. Reverse the order and you get a beautiful date without a meaning.
5. How to combine methods
5.1. A hierarchy of layers
1. Natal chart — what is possible, and which themes repeat.
2. Long time lords — zodiacal releasing, decennials, firdaria: which chapter is running.
3. Year — profection and solar return: which stage is active.
4. Month — lunar return, monthly profections, fast transits.
5. Day and hour — Moon transits, planetary hours, exact aspects.
6. Choice — an electional chart, if action is required.
This is a reading order, not a law. It protects against the main error: starting with an exact date and then looking for a meaning to fit it.
5.2. The rule of two independent confirmations
An event becomes probable when at least two independent layers show it. "Independent" is the key word. The progressed Sun and a solar arc are not independent: the arc is calculated from the motion of the progressed Sun. A transit and a solar arc to the same point in the same month are not two mechanisms either; they are two records of one geometry.
Independent pairs include: a natal promise and a transit to its significator; an annual profection and a transit to the time lord; a solar return and a long zodiacal releasing period; synastry and a composite, if they describe different levels. When two layers agree, the hypothesis is stronger, but the event is not compulsory. When they disagree, describe the tension; do not force a reconciliation.
Orbs are not strength: an exact aspect is stronger than a wide one, an applying aspect stronger than a separating one, a station intensifies a planet's theme, and retrograde motion changes the manner of expression without cancelling it. Time is a window, not a date: a forecast is better phrased as "from mid-spring to early summer" or "within two weeks of the exact aspect".
6. A worked example
The chart below is a teaching construction, not an ephemeris. The point is the logic, not the exact degrees.
Data. A day birth with the Ascendant at 12° Virgo, the Midheaven at 4° Gemini, the Sun at 23° Taurus, the Moon at 22° Cancer, Mercury at 6° Gemini, Venus at 12° Aries, Mars at 2° Aquarius, Jupiter at 9° Cancer and Saturn at 24° Capricorn. Age: 34.
Step 1. Natal chart. The chart ruler is Mercury in Gemini in the tenth house, two degrees from the Midheaven. This sets the spine: public communication and reputation. The Moon and Jupiter in the eleventh house describe networks and income from communities; Saturn in the fifth points to discipline in creative work. This is a map of stages, not a list of events.
Step 2. The long layer. At 34 the person is in the Moon's major period in the day sequence of firdaria (31–40), and within it the Jupiter sub-period (about 33.6–34.9). The Moon and Jupiter are natal eleventh-house planets: a chapter about networks and expansion through people.
Step 3. The year. Annual profection from the Virgo Ascendant: age 34 gives the eleventh house (Cancer), and the time lord is the Moon. The Moon is in its own house, so the theme of connections and collective projects intensifies.
Step 4. Zodiacal releasing. For a day birth the Lot of Spirit is Ascendant + Sun − Moon; here it falls in Cancer. The major period begins with Cancer (25 years), followed by Leo (25–44). At 34 the person is inside Leo, with a sub-period around Capricorn. Leo speaks of visibility and authorship, Capricorn of structure: a network becomes the channel for a well-formed project.
Step 5. Triggers and choice. Saturn through the tenth house or over Mercury demands a restructuring of the role; Jupiter through the eleventh expands the network. If Saturn is square the Moon, the year is about selecting connections, not celebrating them. The solar return shows the dominant stage: the Moon or Jupiter at the return Ascendant confirms the eleventh-house theme, while Saturn suggests restriction. For a presentation, the electional chart is chosen for the task: a strong Ascendant and Moon, the Moon not void of course, good aspects to the ruler of the tenth.
Conclusion. Natal chart, firdaria and profection converge on connections and public visibility; zodiacal releasing adds authorship and structure. The agreement is high, but the forecast remains a window and a scenario. If the layers had diverged, the reading would have described a conflict: "the year pulls towards the social world, while the long chapter requires solitary work".
7. Common mistakes
1. Starting with a method instead of a question. "I have a solar return; what does it mean?" is the wrong order.
2. Using angular methods with a rounded birth time. Houses, directions, returns and astrocartography require accuracy that "around noon" does not provide.
3. Mixing the tropical and sidereal zodiacs, or whole-sign and quadrant houses, without saying so. The convention changes the conclusion.
4. Treating related methods as independent. The progressed Sun and a solar arc are one motion; a transit and a direction to the same point are one geometry.
5. Taking a transit for an event. A transit describes a condition and a time, not a guaranteed occurrence.
6. Ignoring the natal promise. A transit to a point that carries nothing in the natal chart often passes unnoticed.
7. Widening the orb to fit the conclusion. An aspect that "works" only at eight degrees probably does not work.
8. Confusing the collective and the personal. An eclipse acts on everyone; personal meaning appears through the natal chart.
9. Crossing the limits of competence. Medical, legal and financial conclusions cannot be drawn from a chart.
10. Reading stars and myths literally. An image is an image, not a verdict.
11. Ignoring retrogradation and stations. They change the date and the manner of expression.
12. Repeating a horary question until the desired answer appears. This destroys the logic of the method.
13. Rectifying from a single event. Several dates are needed, plus a test on events not used in the fit.
14. Forgetting time zones and daylight saving. Historical charts often contain an hour of error or more.
15. Confusing the solar year with the calendar year. A solar return begins at the exact return of the Sun, not on 1 January.
16. Treating a time lord as an event machine. It sets the stage; it does not guarantee a particular incident.
8. Checklist before reading
- [ ] The question is identified as description, forecast, choice, relationship, place or health.
- [ ] The horizon is defined: moment, day, month, year, decade or lifetime.
- [ ] The birth-time accuracy is sufficient for the chosen method.
- [ ] The zodiac, house system and node convention are declared.
- [ ] The natal promise has been checked.
- [ ] One leading method has been chosen, not five equal ones.
- [ ] One long layer and one refining layer have been added.
- [ ] Orbs, applying and separating aspects, and stations have been checked.
- [ ] Two independent confirmations have been found, or the disagreement named.
- [ ] The answer is phrased as a window, not a false exact date.
- [ ] Ethical limits around health, law, finance and personal freedom are respected.
- [ ] The data, time and place of the question are recorded so the reading can be reproduced.
9. Conclusion
Astrology is strong not in the number of its techniques but in the discipline of choosing among them. The natal chart answers "who and with what"; the long time lords answer "which chapter"; profections and the solar return answer "which stage of the year"; transits and directions answer "when exactly"; electional astrology answers "at which moment to act". Horary stands apart: it has no natal chart, but it has a precise question and a precise moment. Synastry, the composite and astrocartography answer "with whom" and "where".
No method cancels another, and none replaces human judgement. A chart describes conditions; the decision remains with the person. A good forecast is not a list of inevitabilities but a map of possibilities, showing where action is likely to yield more and where waiting is wiser. The more precise the question and the more honest the limits, the more useful the answer.
Prepared by the [Astrobot](https://astrobot.chat) team. Based on the classical and modern astrological tradition.
endant, Moon, houses and aspects, monthly theme synthesis, timing by lunar houses and phases, comparison with natal and solar returns, limitations and common mistakes.