Sports betting research built for the disciplined bettor.

What Martingale Playbook does

• AI daily picks — Claude-Sonnet-4.5 evaluates every MLB, NBA, NHL, NFL and UFC game against live ESPN data, DraftKings prices and 2025/2026 team series. Each pick includes a fair line, edge versus market and a strict Martingale-viability call.
• 1,000-game simulation — pick any game on the slate and get a 1,000-trial deep evaluation with model win %, avg margin, public-trap detection and confidence range.
• Arbitrage scanner — continuous scan across US sportsbooks for two-way and three-way markets where the best available prices sum below 100%.
• Bet tracker — log every wager, track your bankroll curve, and see per-sport and per-strategy ROI over time.
• Staking calculators — Martingale (classic, half, Grand, Great, D'Alembert), Kelly Criterion, flat unit and fixed percentage.
• Morning email digest — the day's best-edge plays, traps to fade and no-bet flags delivered before first pitch.

Pricing

3 days free, then $9.99 per week billed via Stripe. Cancel from the Billing page at any time — access continues until the end of the paid period.

See the full pricing page

Frequently asked questions

What is the Martingale betting system?

The Martingale is a progressive staking strategy where you double your stake after every losing bet, so a single eventual win recovers all prior losses plus one unit of profit. It originated in 18th-century France on even-money coin-toss and roulette wagers and takes its name from the French village of Martigues. It works best on near 50/50 sports outcomes priced close to -110. (Not to be confused with the unrelated 20th-century probability-theory concept of a 'martingale' stochastic process, formalized by Paul Lévy in 1934.)

How does the Martingale method work in sports betting?

Pick a near-coin-flip wager, place your base stake, and if it loses double the stake on the next qualifying bet. Keep doubling until one bet wins — recovering all prior losses plus a unit of profit — then reset to the base stake. At -110 odds with a $200 base stake, the sequence is $200 → $400 → $800 → $1,600 with a $3,000 bankroll requirement over 4 steps.

What is arbitrage betting?

Arbitrage betting (or "sure betting") is placing bets on every possible outcome of a sporting event across different sportsbooks such that the combined stakes can lock in a profit regardless of who wins — provided both legs are placed before the odds move. It works when the best available price on each side sums to an implied probability below 100%. In practice, arbitrage carries real execution risk: odds can move between the two bets, and sportsbooks may limit or restrict accounts suspected of arbitrage activity.

Is arbitrage betting legal?

Yes, arbitrage betting is legal in every US state where sports betting itself is legal. However, individual sportsbooks can limit or ban accounts they suspect of arbitrage — this is a private-contract issue between bettor and book, not a legal one.

How much does Martingale Playbook cost?

3 days free, then $9.99 per week for unlimited AI research, the best Martingale picks per sport and the live arbitrage scanner. Cancel any time from the Billing page.