OSD / Studio / Stake Limits

Stake Limits — per-book / per-game caps

How Stake Limits work

Stake-limit gates cap exposure across multiple dimensions: per-book, per-game, per-modal, and a global minimum stake. They don't decide whether a bet has edge — they decide how much to risk on edges that pass.

The caps

limits.maxBetAmountByBook — per-book hard cap. Object keyed by book name (e.g. { FanDuel: 75, DraftKings: 115, BetMGM: 75, Caesars: 50, Kalshi: 50, ProphetX: 100 }). Trims the Kelly stake to this value if Kelly comes out higher.
limits.maxBetAmountScoped — per-segment caps that supersede the per-book cap when one matches. Array of entries keyed by any of book / league (exact slug) / leagueContains (slug substring) / market / mode / flow / minSharpCount; cap field is amount. Most-specific match wins; on a tie the smallest amount wins. Used to cap unfamiliar leagues (e.g. tennis grand slams or exhibition friendlies) at small dollars while leaving NBA/NCAAB sizing intact. This replay models it via resolveScopedStakeCapForRow, mirroring the runtime resolver.
limits.maxBetAmountModal — default modal cap (currently 75). Used when a per-book entry isn't set.
limits.maxBetAmountPerGame — sum-of-stakes cap across all bets on the same game (currently 375). Defends against correlated-loss exposure when several +EV opportunities point at the same matchup.
filters.minStake — global minimum (currently 5). Bets below the floor are dropped — Kelly fractional values that round down to micro-stakes don't justify the operational overhead.
limits.maxBetsPerGameScoped — a leg-COUNT cap per game (NOT a stake cap). Array of scoped rules keyed like maxBetAmountScoped (book / league / leagueContains / market / mode / flow / minSharpCount) with a max field and an optional logOnly flag. Blocks the (max+1)th concurrent OPEN leg on one game so stacked correlated live legs (run line + total + ML) can't all lose at once. Default ships [{ league: "mlb", mode: "live", max: 2 }], holdout-validated in docs/debates/2026-06-05-sports/mlb-cap-backtest.md. This replay models it via applyMaxBetsPerGameToRows: it orders the would-be-placed legs chronologically (by placement time), counts open same-game legs (keyed by eventId first — the identity the backtest used — falling back to a matchup key), drops the over-cap legs from the replayed summary, and reports the dropped-leg economics in the hint under the exposure cards. logOnly rules count but never drop.

Helper-side parity

The bet-helper userscripts (BetMGM, DraftKings, Caesars, FanDuel, HardRock, Kalshi) each enforce a separate amountMax safety cap of $100 across all six books (raised from 75 in v2026.4.19.3 with version parity). This is a defense-in-depth layer that runs inside the helper after BB sends the order — even if a config bug or upstream miscalculation produced a stake of e.g. $500, the helper would clamp to $100 before clicking. If the helper cap and the BB-side cap disagree, the lower wins.

What this Studio page does

Replays your settled positions and explores stake-cap configurations. The per-game cap is the most actionable — too low cuts realized P&L on legitimate multi-bet games; too high concentrates risk on outcomes you can't control.

Canonical contract: docs/gates.md#stake--limits. Helper-side amountMax safety cap parity is documented in each helper's CHANGELOG entry for v2026.4.19.3.

Data

Remote API Base URL

Remote User ID

Remote API Key

Load remote positions to begin.

Controls

Run Settings

Run Mode

Ranking Metric (diagnostic) Used only to rank replay scenarios in this report.

Minimum Bets for Ranked Scenario Requires at least this many bets for a scenario to be rank-eligible.

Sweep Setup

Single sweep tests one exposure knob across a range.

Stake-limit knobs affect stakeUsed by applying caps (not filtering bets).

Parameter

Explicit Values (comma list, optional)

From

Step

Minimum Sharps Required 0 disables sharp-count gating.

Max Combo Evaluations Run-engine safety cap for Grid and Sharp sweeps (not a segment filter).

Guardrails

Min Distinct Days Requires ranked scenarios to span at least this many settled days. Set 0 to disable.

Max Worst-Day Degradation ($) Rejects ranked scenarios when worst-day profit drops by more than this amount. Set 0 to disable.

Min Green Day Rate (0-1) Requires this minimum share of profitable days for ranked scenarios. Set 0 to disable.

Segment Filters

Sub-selection filters below are applied after Run Mode + Ranking Metric.

Flow

Mode

League

Book

Market Family

Minimum Capped Rows for Rank Display If capped rows are below this floor, ranked scenarios are withheld.

Data Quality & Output

Allow overrides

Optional Config Overrides JSON (applied only when Allow overrides is enabled)

Missing Data Policy

Rows to Show

Load remote positions to start.

Summary

Rows Loaded

Settled Matched

Reference (ROI)

Top Delta (Diagnostic)

Reference Rows With Cap Data

Top Rows With Cap Data

Capped Rows (Ref -> Top)

Stake Lost (Ref -> Top)

Profit Lost Est (Ref -> Top)

Exposure cards compare Reference -> Top scenario values and deltas.

Reference diagnostics: ROI -, Profit -, Win Rate -, Bets -

This is historical replay on bets you already took. Use it for exposure/cap diagnostics, not future-edge prediction.

Scenarios are ranked here for diagnostics. In Auto mode, charts below use the top-ranked knob row.

Param	Reference	Top	Bets	Reference Score	Top Score	Delta	RowsetHash	Capped Rows	Stake Lost

Run a single-parameter sweep or Auto mode to populate these charts.

Shaded band = top-ranked value zone (top 20% by selected ranking metric).

Gold dot = top-ranked score in this sweep.

Line + dots = metric result for each tested value.

X-axis = tested parameter value.

ROI Curve

Run a single-parameter sweep (or Auto mode) to render ROI curve.

Profit Curve

Run a single-parameter sweep (or Auto mode) to render profit curve.

Win Rate Curve

Run a single-parameter sweep (or Auto mode) to render win-rate curve.

Bet Count Curve

Run a single-parameter sweep (or Auto mode) to render bet-count curve.

Distribution

Rows are tested parameter values. Each row shows aggregate results for that value.

Parameter Value	Bets	Pass Rate	Distinct Days	Green Day %	Worst Day	Win Rate	ROI	Profit	Stake	Avg EV