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How to think about exposure

Exposure as a budget, not a rating — plus what a healthy exposure curve looks like and when to intervene.

The most common mistake with exposure is reading it as a rating. It is not. A player at 30% is not "twice as good" as one at 15%, and the exposure list is not a ranking of who the software likes best.

Exposure is a budget

A lineup has a fixed number of seats, and your portfolio has a fixed number of lineups. Multiply them and you get the total number of roster spots you are buying — that total is the budget, and every player's exposure is a share of it. 150 DraftKings Classic lineups buy 1,350 roster spots, of which exactly 150 are quarterback seats. Ten quarterbacks you like therefore average 15% each, whatever you think of them.

This is why "why is my favourite only at 22%?" usually has an arithmetic answer rather than an opinion answer.

What a healthy curve looks like

  • A top that is not a spike. Under the automatic build on Classic, no unruled player goes above a third of the portfolio. A cluster of strong players in the 20–33% band is what a broad conviction looks like.
  • A wide middle. Plenty of players in single figures. This is where most of your differentiation actually lives.
  • A long thin tail. Players at 1–3% are darts — cheap shots with real upside that cost almost nothing and pay enormously if they land. A portfolio with no tail has quietly become one opinion repeated.
  • Nothing parked at a round number. Five players sitting at exactly 20% is a sign of a mechanical rule, not a considered portfolio.

When to intervene

Intervene where you have information, not where you have a preference about the shape of the list. Three cases genuinely justify a rule:

  • You know something the data does not. News, weather, a beat report. Lock, exclude, or set a minimum.
  • You are unwilling to be wrong about a player at that size. A maximum is the right tool — it caps your downside without removing him.
  • You want a specific structure for a specific contest. An exact exposure gives you exactly that number of lineups, no more and no fewer.

Setting many exact exposures at once is how people accidentally make a build impossible. Each one removes freedom, and they interact. Start with the two or three you care most about and add more only if you still disagree with the result.

A minimum is a floor, not a target. If you set 20% on a player the build already likes, you may well get 30%. Use a maximum, or an exact, when you mean "this much and no more".

Try it on a real slate

Martian Flow builds DraftKings and FanDuel lineups for NFL and PGA, with the controls this guide describes.