Finish This Chart Built by The Forecasting Company
Runs in your browser

Human intuition vs. machine prediction

You draw
what’s next.

The future is hidden. Sketch your forecast, then see how you fare against the model.

Take the challenge

A partially hidden time series The historical values are shown on the left. Draw across the hidden future on the right. DRAW HERE →

Drag a line, or click a few points, toward the right.

Yes, really

A real forecasting foundation model is running in this tab. The first forecast downloads a 107 MB quantized t0-alpha graph; ONNX Runtime Web executes every forecast locally through WebAssembly and caches the model for rematches.

A foundation model · in this tab

t0-alpha downloads to this page as a quantized ONNX graph. ONNX Runtime Web runs it through WASM using only the chart’s historical data, and the model never gets to peek at the answer.

t0-alpha Forecasting foundation model
107 MB Dynamic-int8 ONNX graph
WASM Inference runs directly in this tab
Meet t0-alpha on Hugging Face ↗

How it works

Forecasting is easier after the fact.

  1. Study the past. Use the recent history shown on the chart.
  2. Draw the future. Sketch what you think the hidden values will do.
  3. Reveal reality. Both forecasts are scored against what actually happened.

Want a tiny cheat? Hot & cold makes the face react to your partial line without revealing the answer. Assisted results are labeled. Scores are a game mechanic—not a scientific benchmark.

In Freestyle, you draw the entire history and t0-alpha continues it. The little face becomes an art critic, and the finished collaboration can be shared without uploading your drawing anywhere.

We measure aggregate traffic with cookieless PostHog analytics. Nothing is stored on your device and no individual profile is built. Privacy ↗