AATW doesn't know the source of the equation
Yes I do. Tom posted a video above about it Navarro said it comes from the Council of Economical Advisors.
This is the equation they used - they have said it is and I've provided the link to the government site which says so.
People said "hang on...isn't that just the exports minus the imports divided by the imports" and they were like
"No, look, it's really complicated, look at this equation. Aren't we clever?"
Then people immediately noticed they set ε at 4 and φ at 0.25. What's 4x0.25, genius? Those two things cancel out. So it is exactly what people said it was

They then basically put that equation into an Excel formula, or the equivalent of it, and used that to define a global trade policy.
As I keep saying, tariffs aren't bad. They're not good either. They're just a mechanism. But they should be used strategically, not just using some formula to define them.
It's just the latest example of the complete lack of seriousness and competence at the highest level of your government.