Draw the line

You see the first 40% of a real series. Draw the rest, press Reveal, and see how far off you were.

Data as of · Three real series, scored out of 100.

The Dow Jones Industrial Average

Month-end close since 1985. Draw how the next 25 years go.

RealYour lineLog scale: each gridline is about three times the one belowUnit: points
1,0003,00010,00030,000100,0001990200020102020You draw from hereDrag to draw the rest

Draw all the way to the right edge to unlock Reveal.

Where these numbers come from

  • Dow: MeasuringWorth to 2026-08-12, then Yahoo Finance chart API; month-end close, last month to 2026-10-21.
  • Warriors: NBA.xlsx and NBA_RegSeason.xlsx Elo spine (Citizen of Nowhere NBA Elo); season labelled by the year it ends.
  • 10-year yield: FRED DGS10 (Federal Reserve H.15), monthly averages; policy-rate history sits on /business/economy.

The score is 100 minus the average gap between your line and the real one, measured in each series’ own units and scaled to how far that series actually moved. Nothing you draw is stored or sent anywhere.