NFL DFS lineup optimizer
NFL is where Martian Flow started: main slates and single games on DraftKings and FanDuel, with projections built in, football-aware construction on by default, and every control you need when you have a read of your own.
Who it is for
- NFL DFS players who want correlated, sensible lineups without setting a dozen rules.
- Tournament players building 20 to 150 lineups for Sunday main slates.
- Anyone who has had an optimizer hand them a quarterback with none of his receivers.
Football knowledge built in
An NFL lineup is not nine independent picks. Martian Flow pairs quarterbacks with their own receivers automatically, keeps a defense away from the offense it faces, and leaves out cheap players who have no real role on offense — a roster body with zero targets is not a sleeper just because he fits under the cap.
None of this is a rule you have to find and switch on. It is how the optimizer builds with no settings at all, and your own rules still take precedence whenever you set them.
Projections and injury news
Published NFL slates carry Martian Flow projections built from player usage, with the option to upload your own. Players ruled out, on injured reserve or inactive are removed before a build, and a late scratch can be handled by rebuilding only the lineups that contained him.
Main slates and single games
Classic main slates and single-game contests are separate formats with separate strategy — on a main slate you are choosing games, on a single game you are choosing a Captain or MVP and a game script. Martian Flow handles both on DraftKings and FanDuel.
How Gus works
Gus is the analyst built into Martian Flow. He reads the slate you have open — the projections, salaries, game lines, injury and inactive statuses, and recent public reporting — and answers questions about it in plain language: who the value plays are, which game sets up best to stack, how much exposure a player deserves in a 150-lineup portfolio.
When you ask Gus to build, he does not hand you lineups from a black box. He writes a plan — exposures, stacks, Captain or MVP targets — shows it to you, and only builds once you approve it. Every instruction he gives becomes a visible rule in the builder, next to the ones you set yourself, and yours win when the two disagree.
Player exposure
Exposure is how often a player appears across your lineups. Set a minimum, a maximum or an exact figure for any player, as a percentage or a lineup count. On single-game slates the Captain or MVP seat has its own exposure, separate from the player's overall share.
With no exposure rules at all, Martian Flow keeps any one player from taking over the portfolio on its own, and the Balanced strategy holds unruled players to about a third of your lineups.
Locks and exclusions
Lock a player into every lineup or exclude him from all of them in one click. On single-game slates you can lock or ban a player from the Captain/MVP seat specifically. Players ruled out, placed on injured reserve or declared inactive are removed automatically, and if news breaks after you build, you can rebuild only the lineups that are affected.
Stacking
Quarterbacks are paired with their own pass catchers automatically, with no settings at all, because a touchdown pass scores for both. The Stacking section lets you require more: QB + 1 pass catcher, QB + 2, a bring-back from the opposing team, or a custom shape, in whatever share of your lineups you choose.
Defenses are kept away from the offenses they face, so a lineup is never quietly betting against itself.
Portfolio review and diversification
Martian Flow builds a portfolio, not the same lineup 150 times. Lineups are selected together, so the set is diversified by design: exposure is spread, near-duplicates are avoided, and different game scripts get coverage.
After the build, Portfolio Review shows every player's exposure, how the portfolio stacks, how similar the lineups are to each other, whether each of your rules was met, and highly rated players the build left out without a reason you gave.
Contest-ready CSV export
Download your lineups as the upload file DraftKings or FanDuel expects, or fill in the contest's own entries file so every entry is replaced in one upload. Lineups are checked against the site's roster and salary rules before they are exported.
Supported platforms
| Contest | DraftKings | FanDuel |
|---|---|---|
| NFL Classic (main slates) | Yes | Yes |
| NFL Single Game | Yes (Showdown, Captain) | Yes (MVP) |
| PGA tournaments | Yes | Yes |
NBA is in development and not yet available. Martian Flow runs in any modern browser; there is nothing to install.
Questions
- Do I need my own projections?
- No. Published NFL and PGA slates come with Martian Flow projections built in. If you have your own numbers you can upload them, and the optimizer uses yours instead.
- Does it stack automatically?
- Yes. Quarterbacks are paired with their own pass catchers by default. The Stacking section lets you require more, such as QB + 2 with a bring-back in a chosen share of lineups.
- Does Martian Flow guarantee winning lineups?
- No. No tool can. Daily fantasy is decided by games played by real people, and most entries lose. What an optimizer does is build lineups that follow your reasoning and are constructed well — valid, diversified and correlated — so that when your read on the slate is right, your lineups are positioned to benefit.
- How do I try it?
- Create an account and start the free trial. You can build and review a portfolio before you decide.
Keep reading
Build your first lineups
Pick a slate, set only what you insist on, and review the portfolio before you export it. Or open Gus and ask him what he sees on the slate first.
Start the free trial