How Our Tools and Sources Work
Last updated: October 30, 2026
At Portal Místico we want you to know what's behind every result. Here we explain, tool by tool, whether the result comes from a formula, is chosen from texts we wrote ourselves, or is drawn at random, and what the limits of each one are.
Important: tarot, horoscopes, numerology, palmistry, auras, and dreams are symbolic practices. Our readings are for reflection and entertainment. They do not predict the future with certainty, and they are not a substitute for the advice of a doctor, lawyer, psychologist, or financial advisor.
Summary by tool
| Tool | How the result is produced |
|---|---|
| Tarot | Random draw from the 78 tarot cards. The meanings follow the Rider-Waite tradition and are written by us. |
| Horoscope | Texts we wrote for each sign and time period. The text you see depends on your sign, the category (love, work, etc.), and the date. It is not calculated from the exact positions of the planets. |
| Birth chart | Astronomical calculation using your birth date, time, and place: positions of the Sun, Moon, and planets, rising sign, houses, and aspects. |
| Numerology | Calculation using the Pythagorean system: digits or letters are added up and reduced to a single digit, keeping the master numbers 11, 22, and 33. |
| Lunar Compass | The Moon's phase is calculated from the mean lunar cycle. The rituals and retrogrades are guides we wrote ourselves. |
| Palmistry | The image of your palm is processed on your own device. The interpretations apply rules from traditional palmistry. |
| Oracle of the Signs | Texts about love and the zodiac that we wrote, based on the traditional characteristics of each sign and element. |
| Aura test | Quizzes whose answers are added up to assign a color. It's a self-discovery game, not a measurement. |
Birth chart: astronomical calculation
The birth chart uses astronomical formulas to place the Sun, Moon, and planets at the time and place you enter. We use the tropical zodiac and the Placidus house system, the most common in Western astrology. Near the poles, where Placidus doesn't work, we use the Porphyry system. We compare our positions with the Swiss Ephemeris, which professional software uses, and the difference is less than one arcminute. If you don't know your birth time, you'll see the planets in their signs, but not the rising sign or the houses, because those change every few minutes.
Moon phase and moon calendar
We calculate the Moon's age by counting the days since a reference new moon (January 6, 2000) and dividing by the mean synodic cycle of 29.53 days. It's a very good approximation for knowing which phase we're in, but the real Moon varies slightly from one cycle to the next, so the exact moment of a phase can differ by a few hours from astronomical tables.
Horoscope: our own texts
Our horoscopes are texts that we write for each sign and each category, in a guiding tone. The system picks among them based on your sign and the period (day, week, month). That's why two people with the same sign see the same text on the same day. They are not predictions calculated from actual planetary transits; for that, there's the birth chart.
Tarot: chance and tradition
Cards are picked at random from the 78 in the deck. The meaning of each one (22 Major Arcana and 56 Minor) is based on the Rider-Waite tarot tradition and the classic texts that explain it. Each spread is an invitation to reflect, not a prediction.
Pythagorean numerology
We assign each letter a number from 1 to 9 according to the Pythagorean table, add them up, and reduce to a single digit. The numbers 11, 22, and 33 are kept as master numbers. The meaning of each number is a traditional interpretation that we write in plain language.
Palmistry and privacy
The photo of your palm is analyzed on your device and is not sent to our servers. The reading applies rules from traditional palmistry (lines, mounts, fingers) and shows the visual observation behind each interpretation.
Our sources
- Tarot: Rider-Waite tradition and its arcana.
- Astrology: Western tropical zodiac and traditional Chinese astrology.
- Numerology: Pythagorean system.
- Palmistry: classic treatises on palm reading.
- Astronomy: high-precision astronomical formulas, checked against the Swiss Ephemeris.
How we look after what we publish
The texts and tools are created and reviewed by Roberto Rodriguez (more about the author). If you find a mistake, write to us from the contact page and we'll fix it. Please also see our legal notice and our privacy policy.