The grand trine aspect pattern involves 3 points (with 3 or more planets/points), and the trine aspect.
Equilibrium x3
The grand trine consists of 3x trines that connect to one another to create a large triangle or large trine glyph. Exact grand trines are of 1 element, but grand trines can be different elements depending on how wide the orb.
Grand Trine Expression
A grand trine is expressed similarly to a trine, with ease and harmony. However, it’s amplified due to the additional two trines involved and all in conversation with one another. In the case of exact or same element trines, these will bring up issues around that element, within the houses they reside.