30d

“30d” is shorthand for a 30-day lookback window, meaning a metric is calculated using data from the previous 30 days. In cryptocurrency, this timeframe is commonly used on exchanges, charting tools, and analytics dashboards to summarize recent performance without focusing only on short-term noise.

On trading platforms, “30d” often appears next to performance figures like percentage change, [glossary slug="trading-volume" title="trading volume"], or average price. For example, a token’s “30d change” typically compares its current price to its price 30 days ago, while “30d volume” sums the trading activity over that same period. Because crypto trades continuously, “30d” is generally interpreted as the last 30 calendar days, although some services may treat it as 30 trading days or use a rolling window based on hourly or daily candles.

Outside of price charts, “30d” is also used to describe on-chain activity and DeFi metrics. A dashboard might show “30d transactions” for a blockchain, “30d active addresses,” or “30d fees,” giving a view of network usage over roughly one month. In DeFi lending, “30d” can describe rolling totals or averages such as borrowing volume, supplied liquidity, or protocol revenue over the past 30 days.

A related example is “30D volatility,” often calculated as the standard deviation of daily returns over the last 30 days, then sometimes annualized for comparison.