Natal Jupiter is the sign where your Jupiter was placed during birth time, and from there other houses are calculated clock-wise.
If you were born with Jupiter in Pisces, then your natal house is Pisces (Meena Rasi) and during transit, Jupiter forming conjunction (in Pisces), sextile (aspect of 60° which are Taurus and Capricorn in this case), square (aspect of 90° which are Gemini and Sagittarius here), trine (aspect of 120° which are Cancer and Scorpio here), opposition (aspect of 180° which is Virgo here) are discussed in this article.
Conjunction is transiting through same sign as in birth chart, sextile is transiting 3rd or 11th house, trine is transiting 5th or 9th house, opposition is transiting 7th house from natal sign.
Transit Jupiter conjunct Natal Venus : Generosity, optimistic emotional outlook and general popularity are the key notes of this transit. The native continuously strives for social, cultural and professional advancement and sustained romantic relationships. The native feels out going and tries to remain away from disputes. The native is expansive this time and may spend lavishly in consonance with Venusian nature. The native is aware of the needs and requirements of others especially his subordinates. It is now that individual takes fresh courage, gets younger and more spontaneous, attends to his dress and appearance to look more magnetic, more cheerful and more social. The social activities at this time are frequently related to fund raising for cultural institutions. Business and social activities are related to foreigners, people from far away places and religious institutions. It is good transit for business related to art, music, entertainment, luxury items and cultural activities. If Venus is dignified then the native is of loose desires but still famous.
Transit Jupiter Sextile Natal Venus : Consideration for the need of others and happy optimistic attitude characterize this transit. The native can benefit himself and others from his ideas and participation in social activities. If the natal chart promises, romantic and marital opportunities may be present now. A period for financial investments especially in foreign investments. The native corresponds with people of higher status. This transit brings personal comforts and contentment and someone into the life who stirs up the emotional nature. Good transit to plan for some trip, holidays and journeys for pleasure but the only drawback is lack of discipline.
Transit Jupiter Square Natal Venus : Misplaced sympathy, self indulgence and lavishness characterize this transit. One tends to be proud, indecent, superficial, lustful and intemperate. The native engages himself in useless fantasies and slackness in the pursuits of pleasure and luxurious living. There may be difficulties in dealing with foreigners. The native tends to ignore responsibilities due to over indulgence in social activities. The native may face problems due to over indulgence in food and liquor.
Transit Jupiter Trine Natal Venus : Happy, cheerful and generous outlook and kindness and considerations for the needful characterize this transit. There is harmony in business, social and romantic relationships. The artists get recognition this time. Social gatherings and fund raising activities for charitable institutions can be carried out successfully. The native can be successful in business dealings with foreigners. A favorable transit to meet people in power and position. Favorable time for the study and professional work related to education and law and have interaction with foreigners and foreign cultures.
Transit Jupiter opposition Natal Venus : Strife, contentions, imprudence and emotional and financial extravagance characterize this transit. The native is absurd and prone to do foolish acts. There is tendency of inactivity for any new idea. The native is hypocritical in religious, cultural and social involvements and he may not be greatly benefitted by such acts. The native tends to spend more on pleasure trips and vacations at the cost of other important responsibilities.