A configuration of aspects formed by three trines, whose planet pairs connect together three points of a horoscope.

It is a harmonious and very stable configuration. To the person with a Grand Trine as the fundamental configuration in the radix chart (and if the required abilities are in evidence), the vicissitudes of life are frequently not terrible, and external conditions help him to move ahead in life more successfully and faster than others, and moreover, with ease. However, as M.Kozyritskaja and M.Levin observe, this is true only in the first phase of life; during the period from 24 to 30 years old there are inner pressures connected with the necessity for development and the embodiment of initial abilities and opportunities. The negative side of this configuration is that it is so stable that the person seldom ventures beyond the habitual. The stability of the Grand Trine turns on its static character - the unwillingness to develop. A native is able to harmonize with external situations, or even find them easy, not having considered or resolved the problems involved. In charts of great people the Grand Trine is extremely seldom a leading configuration. But, as F.Sakoian and L.Acker remark, if a Grand Trine has Mars and Saturn, the problem connected to inertia and absence of motives for dynamic action does not enter. These researchers underline that to harness the potential of a Grand Trine it is necessary to be guided and to use it in creative self-expression and efforts directed on spiritual self-improvement, otherwise it will stay idle. When analyzing a Grand Trine in a specific horoscope it is necessary to pay special attention to what signs contain the given configuration (usually they are signs of one element) - this will indicate the likely manifestation of the Grand Trine.

If one of the three points of a Grand Trine is in opposition to a planet, it gives the Grand Trine an opportunity to manifest more brightly. In such configurations the most important point of the Grand Trine is the point which has the opposition aspect; and the point opposing it reveals unrealized aspirations, the fateful area of a horoscope. See also the Kite.