The OnlyBoth "standout score" says how many times a neighborhood was found to stand out from its peers, both positively and negatively.
The formula is: #good - #bad - 1/2 #ambivalent. You can calculate a score yourself by looking at the English-language insights that compare to noteworthy groups of neighborhoods, which is the default comparison. Click on Filters, then Select Judgments, and add up the counts. Ignore the #neutral count.
An ambivalent insight says where someone stands out badly among a well-performing peer group. A real example taken from healthcare: "Of the 256 providers within 50 miles that have 5 stars as an overall rating, General Health Inc. is one of just 12 that have a 1-star rating in staffing."