ss666 said:
If i have to do i manually, then each sign should be 30 degrees. When I move from one sign to another I add 30 degrees and after I reach the desired sign, add the remainder as in conjunctions. Then I look what angle it is, and if it's in that specific interval +/- I get the aspect.
And this takes place much quicker once you're used to it. For example, it should take a brief second to see a square, and you automatically know squares are 90, and then you can quickly add/subtract the remaining to see if it's still in orb.
Some observations to make it quicker without doing the math: For inconjunction, they are the opposite sign plus/minus one sign over. A semi-square is a sign and a half. A trine is the next sign of the same element, so the same color. A square is a trine minus one sign.