AI DFS optimizer with a slate analyst you can talk to
Most 'AI' in DFS tools is a label on the same optimizer. Martian Flow's AI is a specific job: Gus reads the slate, answers your questions about it, and turns what you want into rules the optimizer follows — rules you can see, edit and override before anything is built.
Who it is for
- Players who know what they think but not how to express it as fifteen optimizer settings.
- Newer players who want to understand a slate before building on it.
- Experienced players who want a fast second opinion on exposure and stacks.
What the AI does — and what it does not
Gus explains the slate and proposes plans. The optimizer builds lineups with exact mathematics: every lineup is legal, every rule is honored, and the portfolio is chosen as a whole. Numbers Gus quotes come from the slate data and the optimizer's own calculations, not from the language model's imagination — a sentence with a figure that is not in the data is removed before you see it.
Plain English in, visible rules out
Tell Gus "stack Josh Allen with at least one Buffalo receiver in 70% of my lineups" or "take my strongest core and rotate the viable MVP options through it", and the instruction appears in the builder as the same stack or rotation rule you could have set by hand. The Stacking section updates so you can see exactly what he set.
Your settings stay in charge
When one of your own settings conflicts with a proposal from Gus, yours wins, and the plan says so. Nothing is built until you approve the plan, and after the build Portfolio Review reports whether each instruction was met.
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
- Does the AI pick winners?
- No. Gus analyzes the slate and helps you express a strategy; he does not predict results. No one can promise winnings, and Martian Flow does not.
- Can I use the optimizer without Gus?
- Yes. Every control Gus can set is also in the builder, and Just Pick For Me builds with no instructions at all.
- Is Martian Flow affiliated with DraftKings or FanDuel?
- No. Martian Flow is independent and is not endorsed or sponsored by either site. It produces the files each site accepts for lineup upload.
- 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