Mercury gets debilitated when it is placed in the sign of Pisces, which means Mercury becomes very weak by virtue of its placement in the sign of Pisces. Accordingly debilitated Mercury in the fourth house of a horoscope may not produce significant positive or negative results for the native, unless it is supported by the other positive or negative planets in his horoscope. The type of results given by such debilitated Mercury whether they are positive or negative; depend on the working nature of Mercury and on the overall tone of the horoscope in question. Benefic retrograde debilitated Mercury in the fourth house can bless the natives with good results related to marriage, profession, authority, fame, spiritual growth and many other types of good results depending on the overall tone of their horoscopes. The influence of such benefic retrograde debilitated Mercury in the fourth house can especially prove good for the professions of the natives and it can bless them with success through many professional fields, when supported by other benefic planets in their horoscopes. Benefic retrograde debilitated Mercury in the fourth house can bless some natives with spiritual tendencies due to which these natives may engage in spiritual fields, they may achieve spiritual growth and they may guide other people about his field.
For example, if benefic retrograde debilitated Mercury is placed in the fourth house of a horoscope in the sign of Pisces, benefic Rahu is placed in the twelfth house of this horoscope in the sign of Scorpio, benefic Ketu is placed in the sixth house of this horoscope in the sign of Taurus and benefic Mars is placed in the fifth house of this horoscope in the sign of Aries, the native may engage in the field of spiritualism. The native boosted by benefic retrograde debilitated Mercury in the fourth house and other benefic planets may dedicate much time and effort for the spiritual advancement of his soul, he may achieve good spiritual growth due to such efforts and he may choose to guide other people about this field. The collective influence of such benefic retrograde debilitated Mercury and other benefic planets may bless this native with the post of a spiritual teacher or spiritual guru in a spiritual organization and he may earn success and recognition through the field of spiritualism. At the same time, if benefic exalted Sun is placed in the fifth house of this horoscope in the sign of Aries along with benefic Mars, benefic Jupiter is placed in the fourth house of this horoscope in the sign of Pisces along with benefic retrograde debilitated Mercury; and benefic Saturn is placed in the eighth house of this horoscope in the sign of Cancer, the results may improve a lot.
The native boosted by benefic retrograde debilitated Mercury in the fourth house and other benefic planets may start a spiritual organization and he may come across very good amount of success, recognition and fame as a spiritual guru. This is due to the reason that the addition of benefic exalted Sun and benefic Saturn to the fifth and eighth house may provide more strength to this horoscope and the benefic combination of retrograde debilitated Mercury and Jupiter may form Neechbhang Rajyoga in the fourth house. Benefic Jupiter being the lord of the sign of Pisces may cancel the debilitation status of retrograde Mercury and Neechbhang Rajyoga may be formed in the fourth house of this horoscope in the sign of Pisces, which may bless the native with top class results through the field of spiritualism. Hence the native under the collective influence of benefic retrograde debilitated Mercury in the fourth house and other benefic planets may become a well known spiritual guru and his fame may not only spread in his country, it may also spread to many other countries of the world. Apart from this, benefic retrograde debilitated Mercury in the fourth house can bless the natives with success through many fields of profession, depending on their overall horoscopes.
On the other hand, malefic retrograde debilitated Mercury in the fourth house of a horoscope can trouble the native with problems related to marriage, profession, health and many other types of problems depending on the overall tone of his horoscope. Such malefic retrograde debilitated Mercury can especially prove bad for the marriages of some natives and it can trouble them with many types of problems, before as well as after their marriages. Malefic retrograde debilitated Mercury in the fourth house can delay the marriages of some natives under its impact and such delay may prolong with the intervention of other negative planets in their horoscopes. In extreme cases when present in combination with other malefic planets, malefic retrograde debilitated Mercury in the fourth house of a horoscope can keep the native unmarried throughout his life, unless there is a strong marriage promoting planet in his horoscope.