But there may be something almost as useful: Google. In the high-stakes game of betting on what may be the next Hollywood blockbuster, searches for movie trailers are a metric with surprising accuracy.

A whitepaper released today by the search giant’s Think Insights group called “Quantifying Movie Magic with Google Search” reveals that trailer-related searches done four weeks before a film’s premier can be used to determine opening weekend revenue. According to the paper, coupling that “key leading indicator” with the current movie season and a film’s “franchise status” — a metric that evaluates whether a movie is part of a top-tier franchise like James Bond films, or a “midnight” blockbuster like a Twilight film — can predict the box office take with 94 percent accuracy.