7-Day Price History, Volatility and Correlation with BTC
7-day charts built from 5-minute snapshots for top coins, a volatility ranking (coefficient of variation) and Pearson correlation with Bitcoin. Live right now: ETH correlates with BTC at r = +0.98.
What it is
The History page shows three things for the top coins: a 7-day price chart built from snapshots taken every 5 minutes, a volatility ranking, and the Pearson correlation of each coin with Bitcoin over the same 7 days.
How to read the numbers
- Volatility — the coefficient of variation: standard deviation divided by the average price over 7 days. Example: BEAT shows ±7.75% volatility with a 32.79% 7-day range.
- Correlation r — how closely a coin follows Bitcoin, from −1 to +1. The average correlation with BTC across the market is about 0.90.
- r close to +1 (e.g. ETH +0.98) — the coin moves together with BTC, almost like a leveraged mirror.
- r near 0 — the coin moves independently; a negative r means it tends to move opposite to BTC.
Where this is useful
- Entry timing: if a coin correlates with BTC at +0.9+, a Bitcoin dip usually drags it down too — a classic moment to buy.
- Risk assessment: high volatility means larger swings in both directions, so position sizes should be smaller.
- Portfolio thinking: mixing coins with low correlation gives a more stable portfolio.
Worked example
ETH has r = +0.98 with BTC. If Bitcoin drops 3% in a day, Ethereum historically tends to follow with a similar or slightly amplified move. If you were waiting to enter ETH, a BTC-driven dip is your window — and the 7-day chart shows you exactly where the price has been. Meanwhile, a coin with r = 0.3 reacts weakly to BTC, so its entry timing depends on its own news, not on Bitcoin.
Tips
- Combine correlation with the Compare spread to pick the cheapest exchange for the same entry.
- Correlation is not constant — re-check it before big decisions.
- High volatility is opportunity and risk at the same time: size your order accordingly.
The tool is free and updates in real time.
FAQ
What data are the charts based on?
7-day price series built from snapshots taken every 5 minutes for the top coins by market cap. Volatility and correlation are calculated from the same series.
What does the volatility % mean?
It is the coefficient of variation — the standard deviation of the 7-day price series divided by the average price. Roughly, it shows how strongly the price swings around its average: ±7.75% means daily moves of that order are normal for this coin.
What does correlation r = 0.98 mean?
The coin almost perfectly follows Bitcoin: when BTC rises, the coin tends to rise too, and vice versa. Values above 0.85 are considered a strong positive correlation in crypto.
How is this useful for buying?
If your coin correlates strongly with BTC, a Bitcoin dip is usually a buying opportunity for it as well. Low-correlation coins need to be timed by their own news and volumes instead.
How often is the data updated?
The page is refreshed from live snapshots; the 7-day window slides continuously, so volatility and correlation reflect the most recent week.
