How to Check Compatibility With Your Partner Using Natal Charts - Step by Step

So you have met someone. Butterflies in your stomach, eyes sparkling, it seems like this is THE person. Then six months pass, and you realize they fold towels wrong, never wash their own mug, and you see the world in completely different ways.

Of course, astrology won't replace actual communication and personal experience. But it can give you a hint - what to pay attention to, where the growth points are, and where potential conflicts lurk. It is like a weather forecast: it doesn't tell you what to do, but it helps you dress right.

Checking compatibility through natal charts (synastry) is not a "compatible / not compatible" verdict. It is a detailed map of your relationship: where you perfectly complement each other and where you will need to work. And you know what? Sometimes the couples with challenges in their chart build the strongest relationships - because they grow together.

For a real compatibility check, you need data for both people:

• Date of birth - for both partners
• Time of birth - the more precise, the better. Without time, the analysis will be incomplete (but still useful)
• Place of birth - city for both

What if your partner doesn't know their birth time?

This happens often, and it is totally normal. Without birth time, you won't see the Ascendant and house placements - which is an important part. But planet positions in signs and aspects between charts will still be visible, and that already gives tons of information.

Tip: try to get at least an approximate time - "morning," "afternoon," "night." Even approximate time is better than none.

Step 1: Create Two Profiles

On MystarX, just add profiles with birth data for both people. The system automatically calculates natal charts using Swiss Ephemeris.

Step 2: Run the Compatibility Check

Select two profiles - and the system analyzes hundreds of aspects between two charts in seconds, delivering results across 8 parameters.

Step 3: Study Results for Each Type

Each of the 8 compatibility types is scored 0 to 100%. Don't panic if some score is low - read the explanation. Often a low score on one parameter is compensated by a high score on another.

Step 4: Pay Attention to Details

The most valuable thing is not the overall percentage but the specific aspects and their interpretation. They show HOW exactly you interact.

Step 5: Ask Your Astrologer

If something is unclear or you want to dig deeper - your personal MystarX astrologer can analyze your couple in detail and answer specific questions.

Out of hundreds of possible aspects between two charts, there are several that matter more than all others. If you want a quick assessment of a couple's potential - look at these first.

Sun + Moon

This is aspect number one. One partner's Sun in harmony with the other's Moon - it is like two puzzle pieces that fit perfectly. Masculine and feminine energy in balance. If you have a trine or conjunction of one person's Sun with the other's Moon - that is a very good sign.

Venus + Mars

The classic romance indicator. Venus is how you love and what you like. Mars is passion and action. When one person's Venus aspects the other's Mars - there will be a spark. And it works both ways.

Moon + Moon

Emotional compatibility. If your Moons are in harmonious signs - you will simply feel comfortable together. You will understand each other's emotions intuitively, without words.

Mercury + Mercury

Can you actually have a conversation? Seriously, this matters more than it seems. Harmonious Mercuries mean you speak "the same language" - you understand each other's logic, can discuss anything.

Saturn in Synastry

Here is where it gets interesting. One partner's Saturn aspecting the other's planets is the "glue" of relationships. Yes, it can feel restrictive, but Saturn is what makes relationships solid and lasting. Without Saturn in synastry, relationships can be pleasant but unstable.

Let's talk honestly about challenging aspects. They don't mean "it's all over" but they do warn about areas needing awareness.

Mars-Mars Square

This is like two people who both want to drive. Lots of energy but also lots of conflicts. Great for passion, tough for peaceful coexistence. The key - learn to channel this energy into shared projects.

Moon-Saturn Square

One of the toughest aspects. One partner may feel emotionally suppressed by the other. Works if both are willing to work on it consciously.

Sun-Pluto Opposition

Intense, transformative relationship. Can be a powerful bond, but there is risk of control and power struggles. Requires maturity from both partners.

Remember

In astrology, there are no "bad" aspects - only challenging ones. Squares and oppositions motivate growth. Many of the strongest couples have exactly these tense aspects in synastry, because they prevent boredom and push toward development.

If you have ever googled "Aries and Cancer compatibility" - you got a very surface-level picture. Here is why.

When sites say "Aries and Cancer are incompatible," they compare ONLY sun signs. It is like judging a book by its cover - technically possible, but you miss all the content.

Real synastry considers:

• 10+ planets for each partner
• 12 houses for each partner
• Dozens of aspects between two charts
• Lunar Nodes and their karmic significance
• Special points - Lilith, Chiron, and others

Example: a couple might have "sign incompatibility" (Aries and Cancer), but his Venus is in a perfect trine with her Moon, her Jupiter is in his 7th house, and their Saturns create a stable structure. Result - wonderful relationship despite "incompatible" sun signs.

This is why serious compatibility checks are always done using full natal charts.

You have your compatibility results. What next? Here are some tips.

If Compatibility Is High

Great! But don't get completely complacent. High compatibility is a good foundation, but relationships still require work. Use the results to understand your strengths as a couple and lean into them.

If Compatibility Is Average

This is the most common result, and it is completely normal. Look at which parameters score high - those are your strengths. And which score low - those are areas to be more mindful about.

If Compatibility Is Low

Don't panic and don't throw everything away. Low compatibility is not a death sentence. It means you will face more challenges, but through those challenges you can grow as individuals. Many strong couples have complex synastry.

The Main Rule

Use astrology as a tool for understanding, not as a judge. It shows potential and tendencies, but you make the decisions.

If you want to understand your results in more detail - ask your personal astrologer on MystarX. They will explain what each aspect means specifically for your couple and give practical recommendations.