This isn't a Point Horror OR a Fear Street, but I'm sticking it on those shelves because they're obviously what prompted this series.
Of all the "let's cash in on the YA horror craze" books I've read, this is the strangest and arguably the stupidest, but damn it's fun. The Twisted Taurus in question is not only heavily into astrology but also cultivates her own poisonous plants, poisons the heroine (just a test! no biggie! oh look, convulsions) and the heroine's boyfriend (near fatally), tries to bury a girl alive, and regularly converses with the "dark powers" she thinks she's summoning. It's a book that throws every damn thing at the wall to see what sticks; there's also a voodoo doll, a Chinese doctor's medicine box (full of poisons, natch), and I'm probably forgetting some stuff.
Hands down the best scene is the witch girl playing a sexy game of Twister with the guy she likes (and his sister and one of his guy friends), using the opportunity to twist herself sensuously all over him. The word sinuous is used. She's a mega seductress, you guys. I damn near ended up in a coma myself at the effort to make "teen boy gets boner during Twister" sound sinister and erotic.