10X is average last 10 revenue movies by weight. For example last 10 revenue movies of Tom Hanks Catch Me if You Can, Road to Perdition, Castaway,... =162.957, 104.054, 233.6, 136.7, 115.7, 216.1, 172.1, 329.7, 77.3, 126.7(million US$)
Average = (162.957+104.054+233.6+136.7+115.7+216.1+172.1+329.7+77.3+126.7)/10
= 167 is mean average last 10 movie of Tom Hanks is 167 million US$ per a movie.
10X =(162.957 + 104.054x0.9 + 233.6x0.8 + 136.7x0.7 + 115.7x0.6 + 216.1x0.5 + 172.1x0.4 + 329.7x0.3 + 77.3x0.2 + 126.7x0.1) / 5.5 = 166 is mean average last 10 movies by weigt for stress for last movies (more last more stress) of Tom Hanks is 166 million US$ per movie. It Show average movies and stress for last movies.

   For example last 10 movies of Mr. A = 120 110 100 100 100 100 100 90 80 and last 10 movies of Ms B = 80 90 100 100 100 100 100 110 120 Average of Mr.A = 100 and average Ms.B = 100 But 10X Mr.A = 105 and 10X of Ms.B = 95 average Mr.A = Ms.B but 10X Mr.A better than Ms.B Comparative between 10 last movies of A and B last movie A better than B If they play one movie per one year this year is 2003 movie in year 1993 B better Than B that is does't matter for meansure.
     10X is not more not less over than average but in case of Star Power 10X is better than average absolutly.