The Moon is the most important factor in a horoscope .It represents the mind. The inner mind called "Chitta" and the outer mind is called 'intelligence'. It acts as the ascendant when it is powerful. It is never stable like the Chitta and keeps moving with time. It makes a round of the 27 constellations in 27 days staying in each Star for 1 day or 60 Ghatikas. It moves slower and faster due to which it takes roughly 29 and a ¼ days to make a round called as the Chandra mas or Lunar month. Moon is strong when the tithi is from 11th day of shukla paksha (bright half) to 5th day panchami of the dark half. Full Moon has maximum strength hence he is fully benefic. In a horoscope the Moon should be well placed, aspected or associated with benefics to give a good life.

A powerful Moon situated in the ascendant confers a handsome personality, virtuous and loving disposition, wealth, renown and at times "Somnambulistic"(sleep walking) tendencies.

The Moon in the ascendant in a fiery sign makes for courage, ambition, Firmness, and idealistic out look. In Aries ascendant it tends to make a person rash and foolhardy. A person born in cancer ascendant with Moon aspected by mars will be of good conduct, do virtuous deeds, and wield high government authority.

A powerful well-placed Moon gives several Raja yogas:
Anapa yoga :- Planets (except Sun, Rahu and Ketu ) placed in 12th to moon gives this Yoga. Good health names and fame.
Sunapha yoga :- Planets other than Sun., Rahu , Ketu in 2nd from Moon. The person will be intelligent, Hard working and of high Status
Dhurdara Yoga :- Planets except Sun, Rahu, and Ketu on both sides of Moon. Good character owns property and vehicles.
Gaja Kesari yoga :- Jupiter placed in a quadrant from Moon Gives this yoga. Social, popular, wealth, name and fame.
Chandradi yoga :- Benefics, Jupiter, Venus and Mercury in 6,7,and 8th from Moon gives this yoga. The person having this yoga will hold high administrative or political office with power, wealth, Name and fame. Jupiter should be preferably in 7th and neither Jupiter nor Venus should be combust.
Vasumati yoga :- This yoga arises when benefics occupy 3, 6, 10, 11 houses from Moon or the ascendant. This gives financial affluence of very high order.
Amala Yoga :- This yoga arises when a benefic planet occupies the 10th from the Moon or the ascendant.. The person will have unsullied reputation, and will command wealth till his last days, The planet in 10 th should be a functional benefic as well.
Raja yoga (1): - A strong Full Moon occupying a Kendras other than the ascendant and aspected by Both Jupiter and Venus confers High Raja yoga. The person will be a king or equal to a king
Raja yoga (2): - Full moon in conjunction with a planet other than the lord of the ascendant and aspected by Jupiter/Venus/Mercury gives this yoga resulting in High position and wealth.
Raja Yoga (3): - When moon occupies a Navamsa of Sun and when benefics unassociated with malefic are in Kendras from such Moon Raja yoga arises.
Raja Yoga (4): - Vargottama Moon Aspected by 4 or more planets is Raja yoga
Raja yoga (5): - In case of a night birth Moon occupies own or friendly Navamsa and aspected by Venus is raja yoga.

We have seen some of the Good gifts of Moon. Now we shall see the ava (Ill Luck) yogas of moon.

In case of a newborn child the situation of Moon in 6,8,or 12 from the ascendant and is aspected by malefic like Rahu portends death of the child. Similarly situation of Moon in the junction of two houses and conjunct with a malefic is also fatal to the child.

Moon is also significator of Mother. So any affliction to Moon in the child's Birth chart will show danger to the mother also.

In the birth chart of a new born child if weak and afflicted Moon occupies 4th and hemmed in between malefic or Moon aspected by malefic while lord of 4th occupies the 6th indicates possible early demise of the mother.

Sakata Yoga arises when Moon is placed in 6/8 th from Jupiter. 'Sakatam' means the wheel. A person with this yoga cannot stay at a place for long time. It is good yoga for a traveling salesman.

When Moon in Sakata yoga occupies its own or Jupiter's sign the combination changes to "Mukuta yoga" This is an auspicious yoga.

Moon occupying ascendant afflicted by Ketu is "Daridra Yoga" or (Poverty).

MATIBHRAMANA YOGA or Yoga of (madness). Waning Moon occupying the 12th Afflicted by Saturn OR weak Moon and Mercury In a quadrant aspected or conjoined with any other planet gives this yoga. As the name says it the person with this yoga becomes MAD.

Moon occupying any of the watery signs (Cancer, Scorpio and Pisces) and aspected by Malefic shows a predisposition to Tuberculosis.

CANCER: - Debilitated Moon, in conjunction with Sun and further afflicted by Saturn or Mars By aspect OR Moon Saturn conjunction in Cancer or Leo OR Moon occupying the Navamsa of Sun Indicate the native to be prone to Cancer.

Moon in Capricorn or Aquarius and hemmed in between strong malefic indicates mental gloom, depression and suicidal tendencies.

Moon in Aries or Scorpio hemmed in between malefic shows possible injury by weapons and death OR death by Fire

Moon represents the left Eye .Any serious affliction to moon also affects the left eye. There are many combinations of afflictions of Moon. Only a sample of some of the important one's is given here.