The OP seems to be referring to the idea found in Ptolemy (Tetrabiblos 1.17) "…
Oh, gawd gag me with a spoon.
Ptolemy was not an astrologer. He never cast even one chart in his entire life. He was a commentator. If he was alive today he'd be one of the talking heads you see on CNN or Fox or MSNBC spewing nonsense or he'd be a wikipuke, you know, one of those guys living in mommy's basement playing with his man-bun and deluding himself into believing he's an expert because he read something like the guy who claims 200 marines is a "battalion." No, wrong, the TO&E for a marine battalion in 1971 was exactly 1,026 officers and enlisted men which is not "200."
Or like this guy:
https://en.wikipedia.org/wiki/Import_certificates
That guy never went to college and has no experience in economics, banking or finance and he doesn't understand how GDP is calculated or that $1 of imports generates $3 to $18 of GDP.
That's Ptolemy. If you read what he wrote, he's trying to show how astrology fits the Aristotelian view and in spite of using a jack-hammer, crowbar, sledge hammer and 400 tons of plastic explosives to force fit astrology into Aristotle's nonsense he failed spectacularly but he did succeed in making a mess that we're trying to clean up 2,000 years later.
The Aristotelian view is Fire-Water-Earth-Air which would be Aries-Cancer-Taurus-Gemini
Astrology is based on the Hermetic/Stoic traditions which is why it's Fire-Earth-Air-Water or Aries-Taurus-Gemini-Cancer.
If you want to be a better astrologer and make good predictions you need to be reading Plato, Critias Protogoras, Timaeus or from the Roman period Marcus Aurelius because those were all Stoics.
That will give you an understanding of form and matter and of time and space. If you rely on Ptolemy and the Aristotelian view of form/matter and space/time you'll get it wrong.
For that reason natal charts are read differently than predictive charts because of the time/space relationship.
In a natal chart, Jupiter in a right square to Mars is good and Mars in a right square to Jupiter is bad.
But, in a predictive chart where you have directed, profected, progressed or transiting Jupiter in a right square to Mars that is destructive and something very bad (non-natal Jupiter in the 4th place right square natal Mars in the 7th is probably going to be death or serious injury).
Conversely, Mars as any time ruler being directed, profected, progressed or transiting and right square Jupiter is going to be something wonderful.
So, if you want to be a better astrologer ignore Ptolemy and everything he says.