Floor-Ceiling Spread

Floor-Ceiling Spread measures the gap between your worst and best finish. A player who ranges from 1st to 8th has a spread of 7; one who's always 2nd-4th has a spread of 2.

How it works: Spread = worst_placement - best_placement. Lower spreads rank higher. A spread of 0 means perfectly consistent (always the same finish position).

When to use it: As a quick volatility check. It's simpler than full variance calculation and immediately tells you whether a player is a wild card or a steady performer. The result label is already "Spread" because that is what the method actually outputs.

Watch out for: Only looks at the two extremes, ignoring everything in between, so it creates heavy ties and can overreact to one unusually good or bad match. A player with 20 matches and placements of [1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 8] has the same spread as one who constantly bounces between 1st and 8th.