Neech Bhanga Raj Yoga has two words within it-Neech Bhanga and Raj Yoga. Neechbhanga Means Cancellation of debilitation and a Rajyoga is a combination of Power, wealth and authority. When any planet is placed in its debilitated Sign, it is known as Neech Graha and result of such planets is not good. If due to some planetary alignment if this malefic influence is mitigated and the Weakness of the Neech Grah is recovered, such position is Known As Neech Bhanga Raj Yoga.
We get the Reference of this Yoga in Astrological Classics Like Phaladeepika, Devakeralam etc. Now Lets Understand what the Astrological dictum states Neechabhanga Rajayoga means that a debilitated planet on cancellation of its debility gives results of Rajayoga during its period (Dasa).
Debilitated planets always play an important role in the horoscope. In general, they are first-rate malefic, even a benefic that is debilitated will harm those planets and houses it joins or aspects (particularly true for rasi aspects). Debilitated planets also indicate the ruin and loss of those things that they rule, including the things they naturally rule, the houses they rule, and anything that falls in their Rasi, Navamsa and nakshatra. But When their Debilitation is canceled they can bestow good result and make the native fortunate during their Dasha. There are certain factors that cancel debilitation. These factors cancel debilitation reducing the ill effects of the debilitated planet to actually increasing the success of the native. This is Known As Neech Bhanga Rajyoga.
When a planet is debilitated in a particular House, it weakens the house and its significations. But When that house receives the aspect of its owner, the said house will become strong and hence the debilitated planet will gain strength from it. For example Jupiter is debilitated in Makar Rashi. So when Jupiter is placed in the sign of Capricorn, it will make that house and its significations weak. But if Saturn aspects it, the sign will be strong from the aspect of its owner. So Jupiter will also gain strength out of it and it will overcome the weakness of debilitation.
Similarly If the Debilitated planet is conjunct with an Exalted Planet, it will draw energy from the exalted Planet and overcome its weakness due to Debilitation. so it will no more be debilitated and will be able to bestow good result.
When the debilitated Planet become exalted in Navamsa, This implies that the native has done some very good karma in the past birth, bringing forth the blessings of God and hence his debilitated condition or troubles are forgiven and he gets relief.
For Occurring Neech Bhanga Raj Yoga at least a few of the factors discussed above have to occur. A Raj Yoga is a special case where planets get extra power to uplift the native. So when a planet is with Sign Dispositor or Exalted Planet and aspected by friendly planet and again in Navamsa it becomes strong by exaltation or own sign, It will be capable of Giving Raj Yoga Results. Moreover the planet creating the cancellation should not own, be conjunct or aspected by the rulers of, the 3rd,6th, 8th or 12th houses. Furthermore, the rulers of the houses where the NeechaBhanga is taking place should be well placed and well aspected.