Aspect Patterns are a combination of different aspects that create a clear shape or pattern in a natal chart. See the image below. These patterns give more insight into the relationship between the planets and aspects. Each pattern could truly have a whole blog post dedicated to them, but below are summaries.
T-square and Kite aspect patterns from "The Astrology Bible" by Judy Hall"
T-square: Associated with stress and challenges. This aspect is where at least two planets oppose each other and both square a third planet. This causes a lot of tension, especially towards that squared planet. While the opposition indicates clashing needs, wants, and tendencies the two planets will have frustration and potentially inner stress, worry, or anger with/towards the squared planet. The goal is to balance the opposing energies and find strength, beauty, or maybe usefulness from how different the squared body is.
Grand Trine: When three trines connect and form a pattern it indicates a lot of harmonious and comfortable flowing energy. It can boost intuition, creativity, self-confidence, decisiveness, and many other traits. The positive influence is going to greatly depend on the planets involved. However sometimes frustration, stress, sadness, and anger could be hard to express with a grand trine as there isn't an "outlet" or more challenging aspect to add depth to the dynamic of the pattern. The pattern could promote stagnation in some way.
Kite: Associated with both challenges and potential. A complex pattern with three planets forming a trine (also known as a grand trine pattern) and the fourth planet is opposed by one of the trined planets. This forms a sextile aspect to the other two planets. The trine promotes creativity, harmony, and easy expression however the rest of the pattern presents challenges to meet this. Depending on the planets involved confidence in one's expression may be challenged the most often. However the planet opposite the trine’s focal point is key to unlocking the kite’s potential.
Grand Cross: Introspection, resilience and/or willpower towards obstacles, and tapping into hidden potential and weaknesses are themes that revolve around this pattern. Here two oppositions are connected by four squares. Support and strategy are two needs for those with this pattern. Self-awareness is a must to be able to understand the support you need from others and for avoiding impulsiveness or self-destructive tendencies.
Finger of Fate (yod): This involves two quincunxes linked by a sextile. If a planet falls in opposition to the tip of the triangle the pattern forms then energy can be expressed or released. The planet at the point/tip may be a focal point or set the tone for the entire pattern. This is considered a rare pattern and has themes of spirituality, transformation, heightened intuition, karmic lessons or obligations, and unique challenges.
Grand Sextile: A pattern that has six sextiles linked together to form a circle. Harmony and cooperation may be seen among the planet's "relationships" in this pattern. This means the associations and expression of the planets can easily sync, support each other, or at least won't ever cause tension or overshadow one another. An example of this is the Moon and Mercury being part of the grand sextile would indicate emotions and intellect tend to be in balance or at least never tempt or confuse each other. This pattern is known to be favorable for creativity, intuition, problem solving, and mystic talents or connections. This is considered a rare pattern.
Finger of Fate, Grand Sextile, Grand Cross, Grand Trine