Here's how the three championships look going into the final weekend at Homestead.
Cup
Brad Keselowski leads Jimmie Johnson by 20 points at present. If Brad finishes 15th or higher, finishes 16th and leads at least one lap, or finishes 17th and leads the most laps of anyone on the day then he becomes champion no matter where JJ finishes or how many laps he leads. No-one else can win the title now, it's only between those two.
Nationwide
Ricky Stenhouse Jr. leads Elliott Sadler by 20 points. If he finishes 16th or better, 17th and leads a lap, or 18th and leads the most laps then he's champion. Austin Dillon can still win it as well, he's a further five points back.
Trucks
James Buescher leads Tim Peters by 11 points. To make sure of the title, Buescher needs to finish 7th, 8th with a lap led, 9th with leading the most laps. Ty Dillon and Joey Coulter are still in it as well, 12 points and 29 points behind Buescher respectively.