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 Sagittarius, then your natal house is Sagittarius (Dhanus Rasi) and during transit, Jupiter forming conjunction (in Sagittarius), sextile (aspect of 60° which are Libra and Aquarius in this case), square (aspect of 90° which are Pisces and Virgo here), trine (aspect of 120° which are Aries and Leo here), opposition (aspect of 180° which is Gemini 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 Saturn : Inhibitions, self restrictions and cautious approach are the key notes of this transit. The native faces the results of his past actions. A time of confrontations created by the circumstances and the native learns to grow with them. Now the native breaks away from the old engagements and makes changes in vital areas. Usually everything seems to settle for the best. If the native does not make entire changes then cautious renovations in business, home or relationships are required. The native tends to economy in financial matters. This transit can be a boon for a person with great practical abilities natally and a curse for fickle minded persons by birth.
Transit Jupiter Sextile Natal Saturn : Cautious planning for expansion and growth are the key notes of this transit. The native makes steady progress keeping every point related to the matter in his mind. The native exhibits greater responsibility in his professional dealings. Native’s plans show caution optimism and responsibility. A good transit for professionals requiring sound practical judgement like lawyers, politicians and administrators. The native is quite thrifty at this time and makes careful investments.
Transit Jupiter Square Natal Saturn : Business, financial, professional and legal problems are the key notes of this transit. The individual experiences tension in handling his business affairs. The native is unable to locate the root cause of his troubles and uncertainties. The individual should observe care in his financial dealings for his strong tendency to resent the limitations. Impulsive changes with employment may bring disaster. The native remains in a state of uncertainty, neglecting important responsibilities. The native is unable to receive support from those in authority. The native suffers domestically being unable to fulfill domestic responsibilities properly. The native’s ethical, religious and cultural beliefs are at stake. Now he suffers due to past mistakes and learns a lesson for the future.
Transit Jupiter Trine Natal Saturn : Practical approach, honesty and responsibility are the key notes of this transit. The native tends to consolidate his business affairs. The native constructively works for charitable causes. The native tends to achieve his long range goals and objectives in a practical way. The native is able to impress with his plans to those in authority. The native displays responsibility towards his family and domestic affairs. A good transit for politicians, administrators and intellectuals. A good time to handle legal affairs and for approval of projects.
Transit Jupiter opposition Natal Saturn : Lack of confidence and resentment are the key notes of this transit. A poor time to take initiative in any activity. Decisions are very difficult under this transit due to conflict between optimism and caution. Lack of confidence makes the native lose faith in himself. The native desires to forget the past and start afresh. The native tries to make significant changes in his career. One is sure to make wrong investment now. Money returns are delayed and liabilities are much more than usual. Legal difficulties, red tapism and law suits trouble at this time. The native should not expand long distance trade and affairs now. Ethical and moral values are in danger at this time and hypocrisy tends to break down old relationships.