The closing price of BTC in USD. Prices are aggregated from both centralised and decentralised exchanges. Prices are calculated using a VWAP-like methodology where outlier detection is applied to mitigate the impact of erroneous or anomalous trades on the final composite price. Data is available with up to 10-minute resolution and usually arrives with 3-minute latency once the interval has ended.
Prices may occasionally change as late-reported data from individual exchanges is incorporated. However, strictly immutable data points are available in the PIT (point-in-time) version of this metric.