On-chain data is everything recorded on a blockchain itself: addresses and balances, every transfer with its amount and timestamp, fees paid, and the age of coins that have not moved. Because the ledger is public, crypto is one of the few markets where settlement is visible to everyone in near real time.
What it measures
Raw records get aggregated into metrics. The common families:
- Supply and age. How much of the supply has not moved in a year or more, and how much sits dormant.
- Flows. Coins moving into or out of addresses labelled as exchanges.
- Network use. Active addresses, transaction counts, fees paid.
- Cost basis. The average price at which a group of holders acquired their coins, compared against spot to show whether that group is above or below water.
The labelling problem
The ledger states that address A sent 500 tokens to address B. It does not state who owns either. So every "exchange inflow" or "long-term holder" metric rests on a vendor's address labels and cohort definitions, which are proprietary and get revised. Two firms can publish different numbers for the same day and both be internally consistent. Carry the provider and the definition alongside the number, or the number means less than it looks.
In MoonWire analysis
We treat on-chain prints as dated measurements with a named source, never as a verdict. In August 2026 we covered an analytics firm publishing two large bitcoin figures and declining to draw a direction from either — the disclaimer was the story. In September 2026 a measured sector print cut against the narrative that had been built around a single token, which we covered in a Zcash deep-dive. Where a figure reaches us only through someone else quoting it, we say so rather than presenting it as first-hand.
What it is not
On-chain data is not order-book data. It shows settlement that has already happened, not resting bids and offers, and it carries no price discovery of its own. It is also not a complete picture of trading: activity inside a centralised exchange moves on that company's internal ledger and never touches a public chain at all.