The algorithm that runs the app was created using historical stock market data. Weekly, solar, lunar, seven-year and twelve-year cycles were looked at individually to find the average percentage by which the stock market went up or down at each point in each cycle. Each of the numbers you'll see in the 'show factors' section is the average by which the stock market changed on a day in the same position in that cycle.
The large central number is the combination of all five cycles, and much more accurate than the effect of any of the individual cycles alone. It is the algorithm's best guess at the percentage change in the stock market over the course of the day - and because of how interconnected the world is, a great indicator of how hopeful or fearful people will be.
A small but consistent effect size was shown, with the correlation coefficient (R-squared) falling between 0.001 and 0.007, depending on the test data. This represents only 3% - 8% of all the factors affecting the global mood, good news for anyone concerned that astrology is an argument against free will. Assigning the same predictions randomly gave correlation coefficients 100 to 2000 times smaller than those predicted by the algorithm. It would seem the effects of the cycles measured by The Quantified Horoscope are subtle, but also dependable.
In addition to the hard numbers the app produces, it also includes subjective interpretations and advice for the day's score. As someone who's dabbled in palmistry and cast runes, I have an amateur's skill and enthusiasm for this sort of interpretation. Better interpretations could certainly be made, the true innovation of The Quantified Horoscope lies in its scientific approach and results.