A question about indirect arcs and midpoints

Rasalhague

Well-known member
Hello fellow astrologers!

I've got a small question concerning midpoints. I read someplace that this midpoint is illegal:

Neptune = Venus/Neptune.
Where the planet is there twice!

Pluto = Venus/Neptune
Where every planet is there once!

Why is that? And is it ok to use them in indirect arc or is it generally not done?
 
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