On the day Mercury stations retrograde at 22+° Libra, it will square the Moon in its own sign at 28+° Cancer.

Stephen Arroyo delineates the energies of the Moon in Cancer thus:

  • Reacts with sensitivity (sometimes over-sensitivity) and with protectiveness (towards self and others)
  • Feels secure when nurturing and being nurtured by others
  • Natural sense of timing and ability to tune in to intuition and emotional subtleties
  • Extremely sensitive to moods and reactions of others; often at the mercy of one’s own moods
  • Can be over-protective of emotions; strong memory of past emotions is retained forever, still coloring attitudes toward present situations (58)

A square is often described as a ‘challenging’ aspect. However, some friction is always necessary to achieve results. While a trine is described as a ‘harmonious’ aspect, its easy flowing energy can sometimes result in a kind of happy rut (if there’s such a thing), where there is little impetus to change old patterns. (Chirotic draws some fascinating comparisons between them here). So this square with the Moon may not necessarily be a bad thing.

According to Skyscript, a Mercury-Moon square may manifest thus:

The square formed between the Moon and Mercury suggests conflict between your mind and your emotions. You have difficulties making reasonable judgments because your feelings get in the way. Irrational decisions place you at odds with people sometimes, and you have the feeling that you’re being treated unfairly when this may not be the case. You dwell on trivial personal matters and may have a real sense of insecurity. You can communicate well with those that are very close to you. Yet your peer group outside the family can be a problem with which you must deal before you can achieve success. Avoid the tendency to discredit the ideas of others when they disagree with your ideas or challenge you. Try to evaluate the ideas of others in an objective and quiet manner.

And Mars (which will conjunct Mercury) square Moon:

The square formed between the Moon and Mars shows that you have an emotionally volatile nature. It suggests the tendency to become easily upset. You may take matters entirely too personal and often loose your cool. This aspect makes human relationships more difficult because of being demanding or very sensitive. You need to make your way in the world with no interference, and this is very difficult for anyone to do. With maturity you will likely learn to be less demanding on others and refrain from taking offense so easily and quickly. Channeled properly, your energy is boundless, and you can move mountains. Often this aspect results in many emotional crises that can lead to poor health if not handled properly. Harmony in relationships must be a conscious goal.

But uncomfortable as the feelings may be, the fact that Mercury is about to retrograde may allow us the pause and reflection necessary to temper their excesses and mitigate their worst effects. We hope. Pat Paquette writes briefly about Mars’ influence in this post on the Real Astrologers blog.

The key, as ever, is vigilance and awareness.

Arroyo, Stephen. Chart Interpretation Handbook. Sebastapol, Ca.: CRCS, 1989.