Ten years of rolling correlation between bitcoin and ether: today’s 0.876 against a 0.831 median, five decoupling episodes that were really the ETH/BTC ratio moving fast, and why a 70/30 mix ran more volatile than bitcoin alone over the last year.
What Deribit's DVOL index measures, how a year of implied volatility compared with what bitcoin then did, and why ether's reading never came down to bitcoin's.
Every daily entry since 2011 held for one, two and four years: how many ended in loss, what the median produced, and where the four-year rule already bends.
Seven declines of 50% or more in fifteen years of daily closes: how deep each went, how long recovery took, and why the median day sat 46% below the peak.
Two halvings, 1,440 days apart, normalised to their own dates: where the 2020 and 2024 cycles agree, and where they differ by a factor of four.
What perpetual funding is, what 0.01% per eight hours costs over a year, and what seven years of our own data say about the extremes.
What the alternative.me index is actually built from, why it covers bitcoin only, and how often extreme fear and extreme greed have really occurred.
A single 0–100 reading of how hot the BTC and ETH market is versus its own last four years: four components, five zones, and where the index is weak.
Price divided by its 200-day average. What eight years of data say about the distribution, the 2.4 threshold, and why we rank it as a percentile.
The average weekly close over four years. How often price falls below it, why Bitcoin's baseline behaves differently from Ethereum's, and today's reading.
