It’s a manicure-festo.

A new dating guide for bros is making its way around the web, which claims to understand women based on their nails. Called “Nails at First Sight,” the six-page laminated printout is the wacky work of “Rocky,” aka Marwan Alteir, a 26-year-old from Huntington Beach, Calif.

Alteir debuted his “survival guide” via video on Instagram and Twitter, where it’s racked up over 4.6 million views. In it, he claims that he has devoted “countless hours of research” to the subject of women’s talons, and that his conclusions are “foolproof.”

“I had so many bros always asking me, Rocky, how did you know the signs?” the self-appointed Nostradamus of nail art says in his video. “How did you know she was gonna break my heart? How did you know she was gonna rob me of my dignity?”

The answer, Alteir says, comes down to three points of the polish: color, shape and length.

Women with clipped, muted nails are “safe” to date, says Alteir: “You can sleep with two eyes closed [and]…you might expect breakfast in the morning.”

White, black and French fingertips are “50/50,” he says, “could be safe, could be crazy.”

But when it comes to women who favor bright colors — including green, red, orange and yellow — and file their extra-long nails to a point, they are decidedly dangerous, Alteir claims.

“Get health insurance if you know you’re partying and you’re hanging out with them,” he warns. “… If she has the courage to get yellow nails, she has the courage to chop up your b—s.”

Many Twitter and Insta users are telling Alteir that he nailed it.

“And the Nobel Prize…is awarded to @ItsRockkky for his work in saving countless lives in these streets,” one guy gushed.

Even the ladies are onboard with the Miss Cleo of manicures.

“As a girl I can confirm this to be accurate,” one Twitter user wrote.