historical data and projections (1d/1w/1m/1y)
For members. A $5 / month membership on Ko-fi opens the chart: the past day, week, month or year of Bitstamp prices with the projection the model made at the start of that window drawn over what actually happened, the projection for the window ahead, and the statistical tests behind both — interval coverage, log scores against zero-drift and constant-volatility baselines, out-of-sample calibration, the four-year-cycle comparison, and the live record. It also projects any date you pick, up to two years ahead: the price, with its band and spread at 50, 80, 90 or 95 % coverage. The month's access code is in the members-only post on Ko-fi.
One membership, three charts. The same $5 / month membership pays for the members' charts on all three pages — btc (this one), gold and silver — and one code a month opens them all.
Join on Ko-fi — $5 / month, all three charts
The code is checked inside your browser; nothing is sent anywhere. This browser remembers it, for all three pages. Codes change monthly; the new one is posted for members a few days before the month turns, and the old one keeps working through the 7th of the new month. Lost it? Write to [email protected]. The free parts stay free: the number above and the scorecard.