On-Balance Volume (OBV)
A momentum indicator that uses volume flow to predict changes in stock or crypto price.
On-Balance Volume (OBV) — On-Balance Volume (OBV) is a momentum indicator that uses cumulative volume flow to predict cryptocurrency price movements. It adds volume on up days and subtracts volume on down days, creating a running total that shows whether volume is flowing into or out of an asset before the price reflects it.
What Is On-Balance Volume?
On-Balance Volume was developed by Joseph Granville in 1963 and remains one of the simplest yet most effective volume indicators. The concept is straightforward: if a token closes higher than the previous close, all of that period's volume is added to the OBV total. If it closes lower, all the volume is subtracted. The absolute OBV number is less important than its direction and trend.
OBV operates on the principle that volume precedes price. Smart money (whales and institutions) accumulate positions before the price moves up and distribute positions before it moves down. OBV captures this behavior by tracking whether volume is flowing in (accumulation) or out (distribution), often revealing trends before they become visible on the price chart.
How On-Balance Volume Works
A rising OBV line indicates that volume on up-candles is exceeding volume on down-candles — the asset is being accumulated. A falling OBV line means volume on down-candles dominates — the asset is being distributed. The most powerful signals come from OBV divergences. If the price is making lower lows but OBV is making higher lows, it suggests that accumulation is occurring despite the declining price, and a bullish reversal may be approaching.
Conversely, if the price is making higher highs but OBV is making lower highs, distribution is occurring behind the scenes and the uptrend may be weakening. Crypto traders use OBV on daily and weekly charts to confirm the strength of trends and identify potential reversals early — before the price chart signals the change.
Why On-Balance Volume Matters
In crypto markets, where whale activity can disguise accumulation or distribution through multiple wallets and exchanges, OBV provides an aggregate view of volume direction. It cuts through the noise of individual transactions and reveals the net flow of capital. When OBV confirms a price trend (both moving in the same direction), traders have higher confidence. When OBV diverges from price, it warns of a potential trend change — a signal that can save traders from late entries or delayed exits.
Related Terms
Volume Profile
A chart displaying the amount of volume traded at each price level, revealing high-activity zones that act as support/resistance.
Read definition Trading & Technical AnalysisWhale
A trader or investor holding a large enough position to significantly influence a token's price through their buy or sell actions.
Read definition Trading & Technical AnalysisCandlestick Chart
A price chart displaying open, high, low, and close (OHLC) prices for each time period as colored bars.
Read definition Trading & Technical AnalysisRSI (Relative Strength Index)
A momentum oscillator measuring the speed and change of price movements on a 0-100 scale; above 70 is overbought, below 30 is oversold.
Read definition Trading & Technical AnalysisMACD (Moving Average Convergence Divergence)
A trend-following momentum indicator showing the relationship between two exponential moving averages of price.
Read definitionFrequently Asked Questions
Common questions about On-Balance Volume (OBV) in cryptocurrency and DeFi.
Focus on the direction and trend of the OBV line rather than its absolute value. A rising OBV confirms bullish momentum. A falling OBV confirms bearish momentum. Divergences between OBV and price are the most actionable signals — they often precede trend reversals.
OBV is reliable for tokens traded primarily on one or two venues. For tokens traded across many exchanges, the OBV on any single exchange captures only partial volume. Despite this limitation, OBV trends and divergences remain useful signals for most actively traded cryptocurrencies.
Regular volume shows the total amount traded per period without indicating direction. OBV assigns direction to volume — adding it on up periods and subtracting on down periods — creating a cumulative indicator that tracks whether buying or selling pressure dominates over time.
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