Cumulative Volume Delta

What is Cumulative Volume Delta?

Cumulative volume delta (CVD) is a running total of volume delta, the difference between volume traded aggressively at the ask (market buys) and volume traded aggressively at the bid (market sells). Each bar's delta is added to the sum, so the line tracks net aggression through time: rising CVD means buyers have been lifting the offer harder than sellers have been hitting the bid, and falling CVD means the reverse.

How trades are classified matters. With bid/ask or tick data, executions can be assigned to the aggressor side directly. Chart platforms without that feed approximate the split from lower-timeframe bars or candle geometry, so CVD from different tools and feeds (one exchange versus an aggregate, spot versus perpetual futures) will not match exactly. The anchor matters too: CVD can run continuously or reset each session or week, which shifts the absolute level without changing the shape. Traders therefore read slope, swing structure, and divergence rather than the raw number.

CVD matters because it separates aggression from result. Every trade pairs an aggressive order with passive liquidity resting at a level, so laying CVD against price shows whether aggression is being rewarded. When a new high in price comes with a new high in CVD, aggressive buyers are in control and being paid. When the two disagree, someone passive is usually absorbing the flow, and that tension is where many order-flow reads begin.

How to calculate Cumulative Volume Delta

CVD is computed rather than drawn, and each step of the pipeline involves a choice that changes the output.

1. 1Classify volume by aggressor. Trades executing at the ask count as buy volume; trades at the bid count as sell volume. Without tick data, approximate by splitting each bar with lower-timeframe up and down volume, and accept that the result is an estimate.
2. 2Compute each bar's delta: buy volume minus sell volume. A bar can close higher on negative delta, or lower on positive delta; that mismatch is information about absorption, not an error.
3. 3Accumulate: add every bar's delta to a running sum, either continuously or reset at a chosen anchor (session, day, week). Intraday traders often reset at the open so the line reads as net flow for the current session.
4. 4Plot it as a line or as CVD candles (the open, high, low, and close of the running sum within each bar), then compare swing highs and lows in CVD against swing highs and lows in price.

How traders use it

• As a divergence tool: price prints a higher high while CVD prints a lower high (delta divergence), suggesting the push was not backed by net aggressive buying. Most traders treat this as a warning that needs price confirmation, not a standalone reversal signal.
• As an absorption read: when CVD drops hard while price holds a level, sellers are hitting the bid into passive buyers who keep refilling (absorption). If price then lifts, the aggressive sellers are trapped; if the level gives way, the absorption failed.
• As breakout confirmation: a break that extends on strongly expanding CVD shows real initiative participation, while a break on flat or fading CVD looks more like stops being triggered than new aggression (volume at breakout applies the same test with total volume).
• As an effort-versus-result gauge: a large CVD thrust that produces almost no price progress is heavy effort with poor result (effort vs result), often read as the aggressive side exhausting itself into resting liquidity.

Cumulative Volume Delta vs related concepts