Depends on your tolerance band. If it’s zero, then only on days when you hit a new ATH can you count as “at ATH”. If you set a 10% threshold, then you’ll have

Depends on your tolerance band. If it’s zero, then only on days when you hit a new ATH can you count as “at ATH”. If you set a 10% threshold, then you’ll have many more days “at ATH”. My point is that actual ATH (versus “near ATH”) are comparably rare.