On-Balance Volume (OBV)
The On-Balance Volume (OBV) is a simple yet powerful indicator that links price movement with volume. Created by Joseph Granville in the 1960s, it was one of the first tools to suggest that volume precedes price—in other words, when volume starts rising but price hasn’t moved yet, a breakout could be just around the corner.
Unlike some indicators that just show volume bars, OBV gives you a cumulative total of buying and selling pressure. It helps you see whether volume is flowing into or out of an asset, even before the price reacts.
How OBV Works
The OBV line rises or falls depending on whether the closing price is higher or lower than the previous close:
If price closes higher, the day’s volume is added to the OBV line
If price closes lower, the day’s volume is subtracted from the OBV line
If price is unchanged, the OBV stays flat
The result is a single line that trends over time, reflecting volume momentum rather than price momentum.
Here’s a basic summary:
| Price Movement | Volume Behavior | OBV Reaction |
|---|---|---|
| Closes higher | Volume flows in | OBV line rises |
| Closes lower | Volume flows out | OBV line drops |
| No change | Neutral | OBV line stays the same |
How Traders Use It
OBV is often used to confirm trends, spot divergences, or even anticipate breakouts before they happen.
Here’s how traders typically apply OBV:
Trend Confirmation
If both price and OBV are rising, the trend is healthy. If price rises but OBV is falling, the move might lack real strength.
Bullish Divergence
If price makes a lower low but OBV makes a higher low, it could signal hidden buying pressure.
Bearish Divergence
If price makes a higher high but OBV doesn’t confirm, it may indicate exhaustion.
OBV doesn’t give exact entry signals, but it’s extremely powerful as a volume filter in combination with structure or momentum tools.
Example Setup
Let’s say you’re watching a stock that’s stuck in a sideways range. Suddenly, OBV starts trending upward, even though price hasn’t broken out yet.
That’s a warning sign.
Volume is already flowing in. Smart money may be positioning early. A few candles later, price breaks resistance—and the OBV line explodes higher with it. Traders who watched volume flow before price now have the upper hand.
OBV can also help avoid traps. If price breaks out but OBV is flat or declining, the breakout might not be sustainable.
Pros and Cons of Using OBV
Pros
Highlights volume-based accumulation and distribution
Easy to read and interpret
Great for spotting divergence or confirming breakouts
Useful in any market or timeframe
Cons
Can be noisy during choppy price action
Doesn’t provide exact entry or exit signals
Should be combined with price action for best results
When to Use On-Balance Volume
OBV shines when you want to go beyond price and understand the volume story behind the chart. Is the current move backed by real interest—or is it weak and hollow? This indicator gives you a simple way to find out.
It works well in all conditions—trends, consolidations, reversals—and helps you confirm that what you see on the chart has real conviction behind it.
If you want a direct line into market pressure without complex formulas, the On-Balance Volume (OBV) gives you exactly that. Next up let’s explore Accumulation/Distribution Line