CVD (cumulative volume delta)

Every trade has an aggressor: the side that crossed the spread. CVD adds up aggressive buys minus aggressive sells over time; it rises when buyers hit asks and falls when sellers hit bids.

In one sentence: CVD (cumulative volume delta): USD bought by takers minus USD sold by takers, added up over the window. Rising = aggressive buyers dominated.

Formula

delta (bar) = taker buy USD − taker sell USD
CVD (t) = Σ delta of every bar from the start of the window to t

• Trades from the Hyperliquid, Binance and Bybit WebSocket streams of the covered coins; the aggressor side comes from each venue’s trade flag.
• Fills of one taker order at one timestamp are merged into one print; minute bars of buy and sell USD are stored, then hourly bars up to 400 days.

• Price up with CVD up = buying pressure from takers; price up with CVD flat or down = the move came from passive orders or short covering.
• Compare perp and spot CVD where both exist.

• Comparing the CVD level of two windows. CVD starts at zero at the window start, so only its direction and slope inside one window compare.
• Counting every fill as a trade. One taker order that fills many resting orders is merged into one print.

• GET /api/v1/flow/{coin}
• GET /api/v1/tape

Every key uses the data of its plan; see the developer docs for parameters and examples. Developers · API docs

• Free: BTC, ETH, and HYPE, current book and the last 24 hours of flow.
• Pro / API Dev: every covered coin, 7 days · Desk / API Pro: everything stored.
• API: free developer key (10/min, 1,000/day, free-tier data, non-commercial) · API Dev and above (60/min, 50,000/day).

Pricing → · Historical data