DraftKings lineup optimizer

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.