Moon Sign (Chandra Rashi)

The panel above gives your Moon's sign, its degree and its nakshatra, and the short sections under it explain the arithmetic in outline. This long read goes further. It sets out what the classical texts in this app's library say about the Moon and its sign, walks through every step of the calculation with the real numbers for the sample date, explains how to read each kind of result the page can return, measures how much a birth time, a birth place and a clock each move the answer, and follows the sign you get here into every other part of the app that reads it.

Why Indian astrology reads the Moon's sign

BPHS Ch. 3 Sl. 12-13 lists what each graha governs in a single line: the Sun is the soul, the Moon is the mind, Mars is strength, Mercury gives speech, Jupiter knowledge and happiness, Venus potency, and Saturn denotes grief. Saravali Ch. 4 Sl. 1-2 gives the same list and adds the condition that runs through that whole book: when the graha that signifies something is strong, that thing is strong, and when it is weak the effects are meagre. Your Moon sign is the first fact about the graha of the mind - which of the twelve rashis it stood in when you were born. The Moon in Vedic astrology page covers the graha itself; this page is about its sign.

BPHS Ch. 3 Sl. 4-6 lays out the frame this calculator works in: the zodiac is made of 27 nakshatras beginning from Ashvini, and the same circle is divided into 12 rashis beginning from Mesh. Those are exactly the two ways this page cuts one number, the Moon's longitude. Sl. 8-9 then say that the positions of the grahas for a given time are to be taken by Drikganit - calculation of the sky as it is actually seen. That is what happens here: the Moon is computed for your date, not looked up in a printed almanac.

The texts also treat the Moon's sign as a second starting point for the whole chart. BPHS Ch. 7 Sl. 39-43 says that what is read from the 4th, 1st, 2nd, 11th and 9th houses should also be read from the 4th from the Moon, from Kark, and from the 2nd, 11th and 9th from the Moon. BPHS Ch. 12 Sl. 11 puts it more generally: the effects applied to the Lagna are to be applied to the Moon as well. Later writers call this the Chandra Lagna, and Advanced Predictive Astrology (Vol. II, p. 114) uses it in practice, judging a graha's dasha by its position from both the Janma Lagna and the Chandra Lagna. So the sign on this page is not a label; it is a reference point that several other calculations count from.

The Moon is also the fastest of the grahas, and that matters more to this calculator than anything else. Santhanam's note to BPHS Ch. 3 gives average daily motions of 1 degree for the Sun and 13 to 15 for the Moon. Measured on this app's own Moon for every date from 1950 to 2025, a day's motion ran from 11.77 to 15.37 degrees and averaged 13.18, so the commentary's range is a rounded middle. Over 4,170 complete stays in a sign between 2000 and 2025, the Moon spent between 47.0 and 61.1 hours in each sign, 54.65 hours on average, and it came back to 0 degrees Aries every 27.32 days. A sign that holds the Sun for a month holds the Moon for about two and a quarter days, which is why this page keeps asking about your birth time.

The Moon's dignities, and two ways of weighing them

BPHS Ch. 3 Sl. 49-50 names Vrishabh (Taurus) as the Moon's sign of exaltation, with the deepest exaltation at 3 degrees, and puts its debilitation in the seventh sign from there, Vrischik (Scorpio), at the same 3 degrees. Sl. 51-54 add that after the first 3 degrees of Vrishabh the rest of the sign is the Moon's mooltrikona, and Ch. 4 Sl. 10-11 says Kark (Cancer) is ruled by the Moon - its own sign. This app's dignity table in kundaliEngine.js agrees on all three signs and on the 3-degree point of deepest fall.

There is one small difference in labelling. The app's dignity ladder checks exaltation before mooltrikona, so a Moon anywhere in Taurus - at 2 degrees or at 15 - comes back labelled Exalted, where BPHS would call everything past 3 degrees mooltrikona. The ladder gives both the same full position strength, so no number changes; only the word does.

The sources do disagree about how much each dignity is worth, and the difference is large enough to state plainly:

This calculator does not print a dignity at all; it reports where the Moon is, not how well placed it is. The ladder above is what the Shad Bala calculator uses for position strength. A Moon in Taurus scores the full 10 there, a Moon in Cancer 7.5 and a Moon in Scorpio 0 - except that a combust Moon gets 0 in any sign, because that calculator follows Kannan in giving a combust graha no position strength.

The texts also weigh the Moon by its phase, which this page does not compute. BPHS Ch. 3 Sl. 11 counts a decreasing Moon among the malefics, and Saravali Ch. 4 Sl. 9 says the same of the waning Moon. Santhanam's note to that sloka adds a Yavana view by distance from the Sun: within 120 degrees ahead of the Sun the Moon has medium strength, from 120 to 240 it is very auspicious, and from 240 back round to the Sun it is bereft of strength; a waning Moon joined or aspected by a benefic counts as a benefic. Sl. 35-38 add that the Moon is strong at night and in the North, and that benefics gain strength in the bright half of the month. For the sample date the Moon was 90.28 degrees ahead of the Sun - the eighth tithi of the bright half - so it was waxing, and in the medium band of the Yavana view. The Moon Phase calculator gives the tithi, paksha and phase for any date.

The twelve rashis as BPHS Chapter 4 describes them

BPHS Ch. 4 Sl. 3 names the twelve rashis in order, Mesh to Meen, and Sl. 4 lays them over the body of Kaal Purush, Time personified, from the head for Mesh to the feet for Meen. Sl. 5 classifies them: in order they are movable, fixed and dual, and they alternate male and female, malefic and benefic, so Mesh is a male, malefic sign and Vrishabh a female, benefic one. The same sloka gives each a humour - Mesh, Simh and Dhanu bilious; Vrishabh, Kanya and Makar windy; Mithun, Tula and Kumbh mixed; Kark, Vrischik and Meen phlegmatic. These are classical classifications of the signs, not medical advice. Sl. 6-24 then describe each sign; the table keeps the attributes a reader can check against that passage.

Of all this, the engine keeps the names and the lords. Its sign list runs Aries to Pisces with a matching list of Indian names (Mesha, Vrishabha, Mithuna, Karka, Simha, Kanya, Tula, Vrischika, Dhanu, Makara, Kumbha, Meena), which is why the result shows two names for one sign, and the matching engine's table of sign lords is the same as the Lord column above. Day and night strength, rising and direction are not used by this calculator.

Each sign has its own page in the learning library: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.

The Lord column matters for one more reason. Saravali comes back again and again to the lord of the Moon sign - the graha that owns the sign the Moon stands in. Ch. 11 Sl. 11-17 says that a Moon in a sign owned by a malefic does no harm if its dispositor aspects it, and that a lord of the Moon sign at full strength and aspected by benefics can on its own remove the evils the chapter discusses. Ch. 23 Sl. 88 says the Moon-in-sign results come to pass in full only when the Moon, the Moon sign and the lord of that sign are all strong. For the sample date the Moon is in Libra, so its lord is Venus. Knowing your Moon sign therefore also tells you which graha holds your Moon.

The Moon in each sign: what Saravali says and what this app repeats

Saravali Ch. 23 is the classical reading of the Moon in each rashi. It gives one sloka for the Moon in each of the twelve signs, and after each one six more slokas for that Moon aspected in turn by the Sun, Mars, Mercury, Jupiter, Venus and Saturn - eighty-four readings in all. Sl. 88 closes the chapter with the condition just mentioned, and adds that the effects vary with the dignity of the dispositor and of the aspecting graha.

The base readings mix temperament with descriptions of the body, forecasts about wealth, marriage, children and parents, and statements about a parent's lifespan, all phrased as certainties. This app does not reproduce those. What it shows instead is one line of temperament per Moon sign, written in the app's own words. The engine's header says the lines are a curated paraphrase of Kannan's Fundamentals of Hindu Astrology, Chapters XII-XIII, keeping temperament only and leaving out its predictions about appearance, disease and marriage. Here are all twelve, with the Saravali sloka that covers the same sign:

This calculator does not print that line; it stays with the measurement. The line appears on the signed-in Kundali page and inside the Life Blueprint, both of which read the same Moon. The Nakshatra calculator adds the matching line for the nakshatra.

Saravali Ch. 24 carries the same reading one level finer, into the navamsa the Moon occupies. Its closing Sl. 22-24 say the navamsa effects are full when the Moon is vargottama, medium in its own navamsa and minor in others, and that when the navamsa lord is stronger than the rasi lord the navamsa results prevail. Each navamsa is the same 3 degrees 20 minutes of sky as one pada, as the Navamsa article explains, so the pada on this page already names the Moon's navamsa. In the sample the Moon is 27.76 degrees into Libra: the ninth part of a movable sign, counted from Libra itself, which is Gemini. At the 06:42 birth time used elsewhere on this site, the same Moon is at Libra 24.64, pada 2, which is the Taurus navamsa. The Navamsa (D9) calculator computes it for every graha, and needs a birth time and place to do so.

How this page computes your Moon, step by step

The method sections above describe the calculation in two paragraphs. Here is every step with the actual numbers the engine produced for the sample: 14 August 1994, no birth time, no birth place.

1. 1.Fix the instant. With no time, the engine uses 12:00 on the birth date. With no place and no time zone, it assumes India Standard Time, UTC+5:30, and says so in the result (timezoneAssumed: true). Noon IST on 14 August 1994 is 06:30 UTC. Had a place been picked, its IANA time zone would have set the clock, including any daylight-saving offset in force on that date.
2. 2.Convert to a Julian Day - a continuous count of days used in astronomy. For this instant it is 2449578.7708, and the engine turns it into centuries before or after the year 2000.
3. 3.Compute the Moon's tropical longitude with 35 periodic terms from Meeus's Astronomical Algorithms, Table 47.A: 231.5354 degrees. That is 21.54 degrees into Scorpio in the tropical zodiac Western astrology uses.
4. 4.Compute the Lahiri ayanamsa for the same instant. The engine uses one straight-line formula: 23.85306 degrees at noon on 1 January 2000, plus 0.0139601 degrees for each year after it, or minus that much for each year before it. For this instant it is 23.7779 degrees.
5. 5.Subtract to get the sidereal longitude: 231.5354 minus 23.7779 is 207.7575 degrees.
6. 6.Cut by signs. 207.7575 divided by 30 is 6.93; dropping the fraction gives 6, the seventh sign counted from Aries at 0, which is Libra (Tula). The remainder, 27.7575, rounds to 27.76 degrees into the sign.
7. 7.Cut by nakshatras. 207.7575 divided by 13 degrees 20 minutes is 15.58; the whole part, 15, is Vishakha, the sixteenth nakshatra counted from Ashwini at 0. 15 divided by 9 leaves 6, and the seventh entry in the engine's lord cycle (Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury) is Jupiter. The fraction, 0.58, times four is 2.33; dropping the fraction and adding one gives pada 3.
8. 8.Check the Sun. The sidereal Sun was at 117.48 degrees, 90.28 degrees behind the Moon. Combust is set only within 12 degrees, so it is false. Retrograde is set to false for the Moon in every chart.

The nakshatra lord can be checked against the text. BPHS Ch. 46 Sl. 12-14 starts the Vimshottari lords at Krittika - Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu, Venus - and tells you to count from Krittika to the birth nakshatra and divide by nine. Krittika to Vishakha is 14 nakshatras; 14 divided by 9 leaves 5, and the fifth lord in that list is Jupiter. The engine's cycle starts two nakshatras earlier, at Ashwini with Ketu and Venus, which is the same cycle shifted, so it reaches the same answer. That lord is where the Vimshottari Dasha calculator begins; what a mahadasha is explains the rest of the sequence.

Two things are not in the calculation. The Moon is computed geocentrically - as seen from the Earth's centre - and the function that computes it takes no latitude or longitude, so your birth place never changes the Moon's position directly. A place matters in only two ways: it sets the clock your birth time is read on, and, together with a time, it gives an ascendant and so a house. Without both a time and a place that resolves to real coordinates, no house is reported at all - not a guessed one.

With the time 06:42 and Ahmedabad's coordinates, the same date gives a Moon at 204.6401 degrees - Libra 24.64, Vishakha pada 2 - and, because the ascendant is Leo at 2.33 degrees, a whole-sign house of 3: Libra is the third sign counted from Leo. That placement has its own page, the Moon in the 3rd house, and each of the twelve houses has one, from the 1st to the 12th. The same time without a place gives the same Moon and no house. The Lagna calculator shows the ascendant behind it.

Reading every field of the result

Given a valid birth date, a result from this page always comes back available: the date is all it needs, so there is no missing detail that can make it refuse. These are the fields it can carry and when each one appears:

One display edge is worth knowing. The degree is rounded to two decimals, so for about half a minute before the Moon enters a new sign the page prints 30.00 next to the old sign. On the sample day the Moon left Libra at 15:49 IST, and from 15:48:25 to 15:48:55 the result read "Libra, 30.00". Read 30.00 as the last moments of the sign named beside it, not as the next sign.

Without a birth time, the result always reports movement

When no time is given, the page reads the Moon at noon and also at 00:00 and 23:59 of your birth date, on the same clock. Because the pada is one of the things compared, and a pada is only 3 degrees 20 minutes wide, that comparison always finds a change: the Moon never moved less than 11.77 degrees in a day between 1950 and 2025, so it crosses at least three pada boundaries on every date. Run through the real handler for every date from 2020 to 2024, the result reported a change on all 1,827 of them. So the note under a time-less result will always name a start and an end. What matters is which part of the reading moved, and there are four possibilities:

How often does each happen? Across all 27,759 dates from 1950 to 2025, read on the IST clock, the Moon's sign at 23:59 differed from its sign at 00:00 on 12,182 dates - 43.88 per cent, a little under half. That is close to what the arithmetic predicts, since the Moon covers about 13.2 of a sign's 30 degrees in a day. The nakshatra differed on 26,603 dates, 95.84 per cent, and the pada on every one. The real handler, run on every date from 2020 to 2024, gave 802 sign changes out of 1,827, or 43.90 per cent. So nearly half of all birth dates cannot fix the Moon sign without a time, and almost none can fix the nakshatra.

Nine nakshatras sit across two signs

The third row of that table surprises people: how can the sign change while the nakshatra stays the same? Because 27 nakshatras do not divide evenly into 12 signs. Every four signs (120 degrees) hold exactly nine nakshatras, so only the boundaries at 0, 120 and 240 degrees line up. The other nine sign boundaries fall inside a nakshatra, and these nine nakshatras are split between two signs, pada by pada:

For these nine, the nakshatra alone does not tell you the sign; the pada does. That is exactly what happened on the sample day: at 15:49 IST the Moon moved from Vishakha pada 3 to Vishakha pada 4, and with it from Libra to Scorpio. Someone told only "Vishakha" could be either sign. The Vishakha and Anuradha pages describe the two nakshatras the sample Moon passed through that day.

Time, place and clock: how much each one moves the answer

Here is the whole of the sample birth date, minute by minute, as this engine sees it on the IST clock. Every change in the reading is a row:

Five readings in one day, and the noon reading this page shows without a time is only one of them. The consequences reach well beyond the sign. With a birth at 06:42 the Moon is in Vishakha pada 2 and the first mahadasha, Jupiter's, runs until 18 January 2005. At noon it is pada 3 and Jupiter ends on 23 April 2001. At 22:00 the Moon is in Scorpio, in Anuradha, and the life opens instead in Saturn's mahadasha, which runs until 11 March 2013. Same date, three different timelines: a noon assumption moves the Jupiter-to-Saturn change by almost four years against the 06:42 birth, and the late-evening birth does not reach Jupiter's mahadasha for more than a century.

A place matters even without a time, because it sets the clock that noon is read on. Take 13 July 1990. With no place, noon is read as noon IST, and the Moon is at Aquarius 28.88, Purva Bhadrapada pada 3. With London picked as the birth place, noon is read as noon British Summer Time, UTC+1 - four and a half hours later in absolute time - and the Moon has moved on to Pisces 1.40, Purva Bhadrapada pada 4. Same date, same "noon", a different sign, purely because of the clock. This is why the engine prefers the IANA time zone for the birth date over a fixed offset: a July birth in London was on summer time, and reading it at UTC+0 would put the chart an hour out.

Even with an exact time there is a margin. The engine's header puts its Moon within about 0.1 degree, and the project's rules document lists the verified accuracy as 0.1 to 0.3 degrees, because the Moon here comes from a 35-term series rather than a full ephemeris. At the Moon's average speed, 0.1 degree is about 11 minutes of time and 0.3 degrees about 33 minutes. So if your birth minute falls within half an hour of a boundary in a day timeline like the one above, treat your Moon as sitting on the line: another careful program could place it on the other side, and neither would be making an arithmetic mistake.

The ayanamsa is the other moving part. This app uses one straight-line Lahiri formula, which gives 23.1551 degrees at the start of 1950, 23.8531 at the start of 2000 and 24.2265 at noon IST on 2 October 2026. A program using another ayanamsa subtracts a different number, and every Moon within that difference of a boundary changes sign. The Ayanamsa calculator shows the value for any date, and why apps disagree on your nakshatra works through every source of disagreement in detail. What an unknown birth time costs covers the rest of the chart.

Where your Moon sign is used next

The sign this page gives is an input to more of the app than any other single fact about you. Every item below reads the same Moon, computed by the same function:

• Sade Sati and Ashtama Sani count today's Saturn from your Moon sign. The table below shows which Saturn signs set off each period for each Moon sign.
• Gochar reads all nine of today's transits by the house they occupy counted from your Moon sign, following Kannan's transit chapter as cited in the engine. In that reading every graha is favourable in the 11th from the Moon, and the 1st, 4th, 8th and 12th are the testing positions.
• Kundli matching and the free match tool score four of the eight kootas by Moon sign - Varna, Vashya, Graha Maitri and Bhakoot, 15 of the 36 points - and the other four by nakshatra. If your Moon sign is unsettled for lack of a time, those 15 points are the ones at stake.
• Vimshottari Dasha starts from the lord of the nakshatra shown here. When that lord is the Moon - for Rohini, Hasta and Shravana - your life opens in the Moon's own mahadasha.
• Yogas counts Sunapha, Anapha, Durudhura, Kemadruma, Chandradhi and part of Amala from the Moon's sign.
• Daily guidance anchors its houses on your natal Moon sign when there is no birth time, the Chandra Lagna fallback, so today's Moon is counted from yours.
• The free birth chart shows the Moon among all nine grahas, with its sign, degree, nakshatra and pada, and measures whether that sign and nakshatra held for the whole birth date.
• The Sun Sign calculator runs the same chart for the Sun, which changes sign about once a month rather than every two and a quarter days.

The engine names these by whole signs. Advanced Predictive Astrology (Vol. II, pp. 311-313) gives the same 12th, 1st and 2nd signs for Sade Sati and says it comes round once in about 30 years, but also reports a stricter variant in which it begins when Saturn is 45 degrees behind the natal Moon and ends when it is 45 degrees ahead. The two definitions can disagree near a sign edge; this app uses only the whole-sign rule. The engine's own figure for Saturn's stay in a sign is 913 days, which over three signs comes to about seven and a half years - the "sade sati" of the name. If your Moon sign is unsettled for lack of a time, these calculators say so and give the verdict for both ends of your birth date.

Lunar yogas: counting from the Moon's sign

BPHS gives a whole chapter, Ch. 37, to yogas counted from the Moon. Sl. 1 reads the Moon's position from the Sun by kendra, panaphara or apoklima. Sl. 5 is Adhi Yoga: benefics in the 6th, 7th and 8th from the Moon. Sl. 6 counts benefics in the upachaya houses from the Moon for wealth. Sl. 7-10 define Sunapha (a graha other than the Sun in the 2nd from the Moon), Anapha (in the 12th) and Duradhara (in both), and Sl. 11-13 define Kemadruma, the Moon with no graha beside it.

Here the two texts part ways. BPHS Ch. 37 Sl. 11-13 includes a condition about the kendras from the Lagna. Saravali Ch. 13 Sl. 1-2 defines the same three yogas the same way, but its Kemadruma looks at the Moon's own angles and at whether any graha aspects the Moon, without mentioning the Lagna. This app follows Saravali, and requires all its conditions together: no Sunapha, Anapha or Durudhura, no graha in a kendra from the Moon, and no aspect on the Moon. Only Mars, Mercury, Jupiter, Venus and Saturn are counted, since both texts exclude the Sun.

Even though these yogas are measured from the Moon, the Yogas calculator runs them only with a birth time and a place, because the engine's yoga detector as a whole requires an ascendant, and the aspect test behind Kemadruma works on houses. What a yoga in your chart means explains how to read one when it appears.

What this page cannot tell you

• It cannot settle your sign on a date where the Moon changed sign, which is nearly half of all dates. Only a birth time does that; the result names both possibilities rather than choosing one for you.
• It does not judge the Moon. Strength, phase, aspects and the condition of the Moon sign's lord are what the classical texts use to decide how a Moon sign plays out, and none of them is on this page.
• It is not a personality test. The temperament lines elsewhere in the app are one curated line per sign; Saravali itself treats a Moon-in-sign reading as one of seven and conditional on strength.
• It does not show the tropical Moon sign Western horoscopes use. For the sample date that would be Scorpio; the sidereal sign here is Libra.
• It gives no house without both a birth time and a place that resolves to coordinates, and it never invents one.
• It cannot promise that every other program will agree. A different ayanamsa, a fuller ephemeris or a different clock can move a Moon that sits within a fraction of a degree of a boundary.

Questions

My result says the Moon moved during my birth date. Which sign am I?

Look at the two ends the note names. If both show the same sign, your Moon sign is settled and only the nakshatra or pada is in doubt. If they show two signs, it depends on whether you were born before or after the Moon crossed; on the sample date that was 15:49 IST, Libra before and Scorpio after. Enter your birth time in the form and the page reads the Moon at that minute instead of at noon.

Why does a Western horoscope give my Moon a different sign?

Because it measures from a different zero point. The tropical zodiac is tied to the equinox; the sidereal zodiac used here is tied to the stars, and the gap between them, the ayanamsa, was 23.78 degrees in 1994. The sample Moon is at 231.54 degrees tropical, which is Scorpio, and 207.76 sidereal, which is Libra. Your rashi is not your star sign explains the difference.

Do I need to give my birth place if I do not know the time?

It helps if you were born outside India or in a place with summer time. Without a place the page reads noon on the IST clock; with a place it reads noon on that place's clock for that date. For a London birth on 13 July 1990 that difference alone moves the noon Moon from Aquarius to Pisces. For a birth in India with no time, the place changes nothing, because the clock is IST either way.

Another Indian app shows a different Moon sign. Which one is right?

Check the Moon's degree first. If it is within about half a degree of a sign edge, the difference can come from the ayanamsa, the ephemeris, the time zone or a noon assumption, and both programs may be computing correctly. If the degree is far from an edge, check the birth time and time zone each program used. Why apps disagree goes through each cause.

Is the Moon sign the same rashi that is used for marriage matching?

Yes. The matching engine reads each person's Moon sign for Varna, Vashya, Graha Maitri and Bhakoot, which together carry 15 of the 36 Guna Milan points, and the Moon's nakshatra for the other 21. In this engine Bhakoot scores nothing when the two Moon signs are 2nd and 12th, 5th and 9th, or 6th and 8th from each other. The Compatibility feature builds on the same score.

Is the Moon sign more important than the Lagna?

The texts used here do not put one above the other as a rule. BPHS Ch. 12 Sl. 11 asks for the effects applied to the Lagna to be applied to the Moon as well, and Ch. 7 Sl. 39-43 reads several houses from both. Where a choice is made, it is made chart by chart: Advanced Predictive Astrology (Vol. II, p. 137) judges in one example that a Lagna holding three grahas is stronger than that chart's Chandra Lagna. In this app the Lagna needs a birth time and a place while the Moon sign needs only a date, so where there is no time the Moon is used as the reference point - for example in daily guidance.

My Moon is at 29.9 degrees. Can I trust the sign?

Treat it as on the boundary. At 29.9 degrees the Moon is about 0.1 degree, roughly 11 minutes of time, from the next sign, which is inside the engine's stated accuracy. A birth time recorded to the nearest quarter of an hour, or another program's ayanamsa, can put it on the other side.

What does it mean when the result marks my Moon combust?

That the Moon was within 12 degrees of the Sun - close to the new Moon. It happens on about 1 date in 15: 6.61 per cent of dates from 1950 to 2025 at noon. On 26 January 1990, for example, the Moon was in Capricorn on the 30th tithi and marked combust. The Moon Phase calculator shows how far from the Sun your Moon was.

Does a waning Moon make my Moon sign unfavourable?

BPHS Ch. 3 Sl. 11 and Saravali Ch. 4 Sl. 9 count a waning Moon among the malefics, and Santhanam's note adds that a waning Moon joined or aspected by a benefic counts as a benefic. That is a statement about the Moon's nature in the chart, not about the sign, and this calculator does not grade it either way.