OBV (On-Balance Volume) Explained (And When It Fails)
Every indicator is a summary of past price with a specific blind spot. Here is what OBV (On-Balance Volume) measures, when it helps, and the conditions where it will mislead you.
What OBV (On-Balance Volume) measures
At its core, OBV (On-Balance Volume) is a running total that adds volume on up days and subtracts it on down days.
Understanding the calculation matters because it tells you what the indicator cannot see. Every indicator is derived from price and volume — none of them contain information the chart does not already hold.
Where it genuinely helps
Its practical strength is spotting accumulation or distribution that price has not yet shown.
Used as one input among several, it adds context. Used as a standalone trigger, it will disappoint — as will every other indicator.
Where it fails
The known weakness: it treats a 0.1% up day the same as a 10% one.
Knowing an indicator's failure mode is more valuable than knowing its signals, because it tells you when to stop trusting it.
Turning it into an alert
Indicators are most useful when they notify you rather than requiring you to watch. Instead of checking the chart, set an alert at the price where the indicator condition would be met.
You should not have to sit in front of a chart for this. CoinPriceAlert checks the level for you and notifies you when it is crossed, with overnight quiet hours so a 24/7 market keeps normal hours.
Never miss a move in the markets you follow
Set a price or percentage alert once and get a push notification the moment it triggers — free, with quiet hours so nothing wakes you at 3am.
- Fires about a second after the price hits
- Runs on our servers, so it reaches you with the app closed
- Free for 3 alerts — no card, no account
Download the app for real-time notifications
Frequently asked questions
Is OBV (On-Balance Volume) reliable?
It is reliable at describing what it measures, and unreliable as a standalone buy or sell trigger. Its weakness is that it treats a 0.1% up day the same as a 10% one
What timeframe should I use?
Higher timeframes produce fewer and more meaningful signals. Daily and weekly readings are far more robust than 5-minute ones, which are dominated by noise.
Does this apply to stocks and commodities too?
The method does; the numbers do not. Levels, sizing and deciding in advance work identically across asset classes, but thresholds must be recalibrated — equities gap around earnings and only move during market hours, commodities trend more slowly, and currency pairs move a fraction of what crypto does, so a 1% move there is significant.
Set an alert for this: crypto price alerts, or every market and alert type. Choosing an app? How the alert apps compare, from their own pricing pages.
Keep reading
VWAP Explained (And When It Fails)
Every indicator is a summary of past price with a specific blind spot. Here is what VWAP measures, when it hel…
Technical analysisMoving Averages in Crypto: The 50, 200 and the Golden Cross
Moving averages are the simplest trend filter that still works. Here is what each one is actually telling you.…
Technical analysisWhy Volume Decides Whether a Price Move Means Anything
The same price move on heavy and light volume are two different events, and reading them the same way is a per…
Technical analysisVolatility rank Explained (And When It Fails)
Every indicator is a summary of past price with a specific blind spot. Here is what volatility rank measures, …