Occasionally we run into a synastry chart that defies common sense. Problems that are in the Natal chart show up in relationships but then do not surface in others. Midpoints may solve the mystery. There used to be a wonderful generator out there, but it appears that the site is no longer online. Fear not, a pencil and paper will work out just fine. For those that are committed to an easier route, Astrodienst does have a chart under the style Pullum to make it quicker. As always, I do suggest doing the math yourself, as you will appreciate the outcome better.
Below is the easy template of the degrees of the sign at their 0 degree point. You will take the degree and assign it a full degree of the circle. Examples: Taurus 05 would be 30 degrees plus 5… 35 degrees. Or use 22 Sagittarius as 240 plus 22 making the degree 262. Do this for each planet and then add the final degrees and divide by two… this will give you the midpoint degree… with the examples above 297 degrees. Divide in half and you get 148.5 and round up. Look at the list of sign degrees below and subtract the largest number less than the new amount. In this case 149 less 120 (Leo) and that leaves 29 degrees of Leo… that is the midpoint for those two planets. Initially start with individual charts and see what you have. Do not try between two charts unless you have mastered the Natal Midpoints. The most important thing to remember is that there are TWO midpoints for every calculation. Usually, we refer to the closest point, but the exact opposite is also a midpoint taking the long road home. So in this example, the other midpoint would be Aquarius 29. Both are valid and equally strong points in a chart. The midpoint is where the two planets meet in agreements. This is handy for difficult charts.
I haven’t put much stalk into this method until recently. Really, it is extra work, why would I? Then I wondered about a specific individual… usually I get along really well with others that have Mercury and Mars conjunct… and this felt like that, but the other person has a trine between the planets instead. Once I looked at the mid points of his Mercury and Mars, I found they were conjunct my Mercury and Mars conjunction exact. The opposite midpoint falls on my Descendant. The same chart I had wondered about how the Moon square Venus would play out…. I have been involved with others with this aspect, and it is one that I dread, as it gives the either emotional involvement or sexual desire… it is difficult to pull the two together. Looking at the midpoint it lands right opposite my Jupiter and completes a Grand Cross in my chart. (Remember the opposite midpoint… that landed on Jupiter itself) This point is where the two planets have a common ground. I don’t suspect that either or is going to be so much an issue. Further study of the midpoints and applying to the other person’s chart shows all of the conjunctions that were missing in the synastry.
Would I suggest that this method be used exclusively… no, but do play around with it to discover where a problem Natal is able to function. Most importantly is taking into account the amount of maturity of the individuals. Midpoints as a solution would require a conscious effort to override the Natal Promise… it must work in cooperation.