Dollar Bars guided playground

Choose a tape, step through exact price × quantity contributions, and observe the inclusive threshold. The failure scenario rejects mixed currency before an invalid sum is formed.

Cumulative reported notional

Dollar Bar cumulative statePreview and admitted trades plotted against the target, with complete-bar and rejection markers.
AdmittedPreviewBar closeRejected

The canonical state starts with 18 admitted trades, so one close and a forming bar are already visible. Use Back or Step to inspect the boundary.

Recent contribution trace

TradeTimeCurrencyPriceQuantityContributionOpen-bar cumulativeDecision

Keyboard: Right Arrow = Step, Left Arrow = Back, Space = Play/Pause, R = Reset. Reduced-motion mode makes Play advance one step.