Chandra Yoga is one of the yogas mentioned in B.V. Raman's book 300 Important Combination. Moon is known as Chandra/Soma in sanskrit and hindi. Having said that equating planet Moon with the vedic deity Chandra maybe inaccurate just like its inaccurate to equate Roman God Jupiter who is God of thunder and lightning with planet Jupiter.

Vedic folklore considers Chandra as a deva(celestial being) who was responsible for starting one of the twelve dev-asur sangrams(celestial wars) which threatened all life in this universe. Over and above the Mahabharata War involved descendants of Chandra including Kauravas, Pandavas and Yadavas. Vasudev Krishna was born in Chandra's lineage.

Chandra Yoga is formed when there are planets situated in odd houses namely the:

• First House/Ascendant
• Third House.
• Fifth House.
• Seventh House
• Ninth House
• Eleventh House

Note: The only criteria for Chandra Yoga to happen is placement of all planets in odd houses. That means they can be concentrated in one or two houses and still this yoga will happen. All odd houses need not have planets in them for this yoga to fructify.

• North Style
• South Style

 

Individuals born with Chandra Yoga can command respect, earn and spend well. Others around him will submit to his/her authority. B.V. Raman is of opinion that Chandra Yoga is quite common and effects of this yoga should not be overestimated. But B.V.Raman also said individual born with this yoga maybe quite influential in his/her circles.

Normally Sun, Venus and Mercury move very close to each other in horoscope. Chances of Sun, Mercury and Venus placed in odd houses away from each other is extremely rare especially for Mercury. If this yoga has to form than Sun+Mercury or Sun+Mercury+Venus have to be together in an odd house.

Another thing to note is B.V.Raman hasn't specified if Rahu and Ketu need to be consider for this yoga to form. If they are indeed considered than this yoga maybe rare. But if only seven planets namely Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn are considered than perhaps this yoga can be quite common happening every few years or months depending on transits of slow moving planets like Jupiter and Saturn.