Trading Volume Explained: Why it Matters for Breakouts, Reversals and Trends

This happens all the time: price zooms through resistance, the trend looks amazing, and you want to go for it. The only problem is, you could get stopped at the entry, you could buy and have price return to range within a week and have your loss continue to grow. What happened? Often, the answer is clearly visible at the bottom of the chart, where most traders do not look.

By this point in the series, you should have a good understanding of how to identify trend, how price will act at and around levels of support and resistance, and how we use RSI and momentum to better time our entry. Each of these tools add to our image of what is happening with price.

But there is one piece of data that is not being added with the above analysis:

How much market participation was behind the move?

Volume is the tool for answering that question.

Why Volume is the Layer Most Traders Skip

Volume looks nothing like price. There’s no obvious uptrend, downtrend or anything in between. It just looks like a line of bars sitting on the bottom of your chart, which is why it is usually dismissed by new traders. But I would argue volume is the second most important information on a chart.

• Price tells us direction
• RSI tells us momentum
• Volume tells us commitment

The three cannot be swapped. A breakout looks good, but what if there is not that much participation? A steep swing in the other direction looks like a reversal and great short signal. But what if there is high participation? Volume is absolutely necessary because the price action itself is very misleading. Especially now where we see price move significantly in one direction on less and less participation, only to reverse just a few hours later.

So this article is here to show some ways to read volume that are easy to use. We will look at what volume typically looks like in healthy trends, what volume says when we see a reversal or breakout and most importantly how volume can work with what you have learned previously to confirm (or not confirm) what price is telling you.

I am not trying to make volume a stand alone signal generator; it just isn’t that. But as a tool for confirming price, I cannot think of a better one.

What Volume Tells Us

Very simply, volume is the amount that was traded that day. Volume is commonly displayed on its own bar (or histogram) on your chart under price. Price shows us what happened during the trading period. Volume tells us how much participation was happening to cause the price to move that way.

Volume = Participation and Commitment

So really, the best way to think about volume is that it is measuring market participation. The higher the volume, the greater the market participation, the number of buyers and sellers making decisions to trade the stock and pushing price either higher or lower. Conversely, a lower volume is reflective of lower participation.

• High volume = Stronger participation/commitment
• Low volume = Weaker participation/less follow through

Looking just at price doesn’t really help us to answer an important question: “Is this significant?”

Here’s three ways that could appear:

I had Bread Financial on my radar in the first half of 2025. The stock had been chopping around in the low 60s for weeks, but then, in February, the character of the stock’s chart shifted. It wasn’t an abrupt change; in fact, it wasn’t an abrupt change at all. Rather, it was a slow leakage lower day after day. What stood out in this scenario was not the change in price, but the change in the volume pane. As the decline unfolded, the volume bars were the largest I’d seen on the chart in months. This scenario is an example of a trend where sellers are becoming increasingly more aggressive in the trend’s evolution. If you look closely at the chart below, you can pinpoint the moment when the sentiment changed.

As the downtrend evolved, volume was increasing, as shown by Bread Financial. Source: TradingView

In a similar scenario, I had Peabody Energy on my radar in the late summer of 2025. The stock had been building for weeks on end in the mid teens, sitting still, waiting for a catalyst. Then in September, the stock started moving higher with more volume backing those up days. Each up day was above average, the moving average on volume started curling up and by the time price broke through into the 30s, BTU’s buyer participation was strong. This is the healthy trend where both price and volume are increasing.

As the uptrend evolved, volume was expanding as well, as shown by Peabody Energy. Source: TradingView

And then, here’s the one that often goes unnoticed:

I had Keel Infrastructure in the second half of 2024 into early 2025 and learning about this is where I made a major shift in my thinking. As price continued to make a lower low after lower low in the downtrend, the volume was consistently shrinking as each new leg of the downtrend unfolded. This scenario is an example of a downtrend losing volume, not a downtrend gaining momentum. Sellers still hold the advantage, but the participation is decreasing from each turn. It doesn’t necessarily mean the downtrend has peaked; it may continue for a few more days; but if you are looking to trade the downtrend, a shrinking volume scenario should cause you to at least take notice.

As the downtrend continued, volume was decreasing, as shown by Keel Infrastructure. Source: TradingView

So, those were three different scenarios, and again, this is what you want to notice: the instances when the volume doesn’t appear to agree with what price is doing.

Price and Volume: Two Distinct Signals

An important note, this one trips people up a lot so I want to be very clear: price and volume are two different elements on the chart. The price is the candle, the volume is the bar. I want to repeat that again, people get confused, I’ll say it again: price tells you there was movement, volume tells you what it was. They are complimentary. So, if price breaks to the upside, that’s telling you there was a breakout; the volume going up is an indicator, the lack thereof also tells you something. They work together and they’re two different sets of info, two different data points. With heavy volume on breakout many people are buying into this new price, low volume and only a few people are there so the crowd doesn’t really agree with where the price is going. Most of the time, failed breakouts come from that second scenario, which brings me to my next chart.

Why Volume Matters in Trading Decisions

I’ll tell you this, this was the chart I almost needed to print out and tape to my computer screen once I saw it.

I had been watching the CapForce IBD 50 ETF earlier this year. In April, into May this is great looking price action; a nice, steady advance off the lows, not a scary candle to be seen. If you were staring only at those candles you might get pumped.

Look at the volume pane below. While price was making that beautiful advance, volume was on the decline, moving average declining. The price went up, the volume went down.

That’s a red flag, a rally on less participation is one that’s running on the fumes. Even if the trend sticks around for a few more days, it’s shaky at its foundation and it’s a chart where I’m going to want to tighten my stops rather than add more position.

A rally on declining participation in CapForce IBD 50 ETF, as shown above. Source: TradingView

Including volume in your analysis is a way to help you understand three types of moves in the market each and every day:

• The ones with high volume, most likely to continue
• The ones with low volume, most likely to fail, or reverse
• The ones where volume is either building, or dying while price moves, which could signal trend continuation in the first case, or potential reversions in the latter.

Using Volume as a Signal for Trend Strength

Here’s a setup I deal with all the time, let’s say you have a couple of stocks that have both pulled back, just broke out from that consolidation on a solid base, both of them look great on charts, which one do you buy?

The one with the most volume, always.

Volume and price usually move in harmony in a healthy trend. When prices move up during a strong uptrend, volume will also increase. During pullbacks, volume will decrease. Increasing volume is telling you that buyers are getting aggressive. Decreasing volume is telling you there are not many sellers. In both cases, the trend is backed by volume. In a healthy downtrend, the opposite is true, as volume expands as price is falling and contracts as price rises.

We can look at this more specifically:

• Increasing volume and rising prices indicate a continuation of the move with volume backing.
• Increasing prices with decreasing volume indicates underlying weakness.
• Decreasing prices with expanding volume indicates more selling.
• Decreasing volume during a sideways range indicates a pause rather than a reversal.

Of course, price could continue the trend even on decreasing volume. It is perfectly possible for prices to rise or fall on less volume. However, it is something you should pay attention to in an increasing trend, particularly when the volume is falling while the price is rising to a potential exhaustion zone level.

Volume-Confirmed Breakouts

The best place to take advantage of all of the concepts discussed so far is at a breakout. I had watched Guardant Health (GH) for a few months as it was consolidating near $99. The stock had been hitting that area and was testing the descending trendline that it had hit every time it rose since January. With each test, there was less interest in the stock until the test in mid-May. That is when the price broke out above the descending trendline.

That’s when the volume bar for the day showed significantly higher trading volume than we’d seen in weeks. It wasn’t slightly higher; it was much higher. That is a sign that there is broad-market support for the higher level. If a price breaks a major level with high volume, it is more likely to see additional movement. GH rallied to $128 in the weeks after the breakout.

Volume spike on the breakout, as shown by Guardant Health above. Source: TradingView

Low volume breakouts are not that significant because they often are pulled back to previous levels, making it easy for them to fail since there aren’t many participants at that level. However, volume on a chart cannot lie to you. Volume analysis is most meaningful at the most important times in any chart, such as breakouts from price ranges or trend changes. Both of those situations represent times where price must either move into a new trend or stay within a new range. These are also times when traders often make mistakes.

Here is another one I’ve been tracking, Agnico Eagle (AEM), which broke out of the horizontal resistance zone at 187.50 for three weeks in January 2026. A breakout candle with expanding volume is a very bullish signal in and of itself, but this chart’s usefulness lies in what happens next. As AEM pulled back from the high in April and May, volume also increased. Volume confirms the market is bullish as well as bearish. A breakout candle with high volume confirms bullishness, and that same volume signal confirms bearishness when the market moves down.

Volume confirms price direction, as shown by Agnico Eagle above. Source: TradingView

In a market, a move against prevailing trends tends to reverse, so a pullback from new highs should also be confirmed by increased volume, indicating that the prevailing trend is not in question.

Volume Spikes at Turning Points

Another use for volume is to help you identify when a move (or trend) may end. Look for a trend that has been advancing for weeks and months followed by a sudden (and often vertical) increase in trading volume. This volume spike represents an emotional panic on the part of buyers (who are now eager sellers) or, alternatively, a rush by buyers to enter into a long position (now that the bulls have made a strong breakout), or latecomers to a party already underway.

This is what’s known as “exhaustion.”

This is a really interesting chart of Palantir, which I’ve been tracking for over a year now, and is a textbook example of what is sometimes called “volume at an extreme.” Almost every major local high and every local low is accompanied by a volume spike. The spike can sometimes happen the day before the turning point, sometimes on the day of the turning point, sometimes the day after, but there is always a volume signature associated with a major turning point.

Volume spikes near turning points, as shown by Palantir above. Source: TradingView

Again, the volume spikes are not a guarantee (there are none, as I’m sure we all know), but they are a sign that market participation is shifting from accumulation (or distribution) to emotional reaction, which usually means one of the major players has “run out of fuel” for this rally.

For capitulation in particular, I recall watching AVA (Avista) in the latter half of 2025. There were times when the price would break down to new lows while the volume spiked, multiple times the usual volume per bar. In all those cases, the price was at a low and began to move higher on the very next bar (or bars).

Volume spikes at the lows, as shown by Avista above. Source: TradingView

This is classic capitulation. The last holders of the stock, in one final spasm of panic and desperation to sell, dump their shares in one massive move. At this point, there are no sellers left. Volume has peaked and there is now nobody left to sell.

Another vital signal appears when the market moves consistently in a specific direction yet sees participation decline. Even if you aren’t noticing a volume spike, a contracting volume signature can presage a market reversal.

Contractions Precede Expansions: The Coiled Spring

Markets naturally alternate between phases of contraction and expansion. During sideways price action, for instance, volumes tend to contract, volatility tightens up, and traders step back to await the emergence of a clear trend direction. This quiet period is crucial to watch because an expansion phase almost invariably follows a period of consolidation once a direction is chosen.

Astera Labs (ALAB) is a prime example I have been watching closely. Over the period from November 2025 through early February 2026, ALAB moved in a sideways, range-bound manner, with little to no real trading decisions being taken. As price consolidated, the trading volume slowly tapered.

Then, in early February 2026, the sideways range broke. Price sold off significantly, and here it is critical to note: trading volume surged on the breakdown. All of that contracting volume had stored energy like a compressed spring. When the market finally selected a direction, the influx of new participants that entered the trade transformed what was a mundane price range into a tangible trend.

Volume contracted during the range-bound action and expanded on the breakout, as shown by Astera Labs above. Source: TradingView

If you start looking for this dynamic, you’ll find this setup repeatedly across all charts. Pay close attention to the quiet periods because they typically precede the chaotic, noisy ones.

Combining Volume with Other Indicators

The central message regarding this volume discussion in its entirety is that volume should be used as a confirmatory signal, rather than a primary, standalone signal. It is most useful in confirming a movement already taking place in price and gauging the strength, dedication, and duration of the price move in question.

When price, momentum, and volume all align and move toward a single direction, that setup will generally be more robust. But remember, it will not be a foolproof setup; rather, you should be looking for anything that is more likely to work rather than a setup that is perfectly reliable at all times.

We have trading indicators that can help the trader comprehend market action. Some of them are moving averages, Fibonacci retracements and the RSI indicator as it relates to trend momentum. We can also utilize them for identifying both price structure and trend momentum. However, they are only a step towards a full picture of the overall market.

But each of these indicators will be valuable on their own.

Here is how they will answer different questions:

• Price structure will indicate the direction of the trend as well as the price levels.
• RSI will indicate the size and speed of the trending move.
• Volume will indicate the level of participation within that trending move.

When we have the market lined up on all three of those levels, it significantly increases the probability that the current trend direction will continue. With that in mind, let’s walk through a few examples to see how all of this lines up in practice.

The Bullish Alignment

June 2025. AST SpaceMobile (ASTS) is going to be one that sticks in my mind for some time. ASTS had been chopping around for weeks in the low-to-mid 20s. And then, one day, it busted above 29 pretty clearly. I take breakouts like this seriously. Most of them fade, but a few stick. I knew something different was happening with ASTS.

The breakout bar itself was good. The volume bars in the following several sessions, on the other hand, were massive. Each one was larger than what ASTS had produced in the previous two months. RSI started moving in the same direction as the chart. It broke over the 50 line and moved towards overbought territory.

Three signs pointing in one direction. Price confirmed the breakout. Volume confirmed the participation. RSI confirmed the momentum.

ASTS climbed from 29 to nearly 60 over the next couple weeks. This is what alignment looks like when it shows up in real-time.

Bullish alignment, as shown by AST SpaceMobile above. Source: TradingView

The Bearish Alignment

The same rules apply in the other direction. PLTR in February 2025. PLTR is a stock I had been watching for weeks before the move started. PLTR was in a nice uptrend, when suddenly it developed a rising bearish wedge. A wedge formed while the tops and bottoms both increase, but the tops increase at a slower pace. Usually a sign of a market top.

As PLTR fell out of the wedge in the middle of February, three things were true all at the same time:

1. Price broke through a key support level.
2. Volume increased on the downside.
3. RSI broke below 50.

Everything was lined up and it went down from there. PLTR fell over the next few weeks and erased 40% of its value before finding a bottom.

Bearish alignment, as shown by Palantir above. Source: TradingView

The Reversal at a Major Support or Resistance Level

And then there’s ABNB (Airbnb) in August 2024. This is actually one of my favorites, one that I use for teaching. I use it when I want to remind myself what true alignment looks like. ABNB had been trending downwards for months. Finally, it crashed to a major support level around 113. ABNB’s capitulation day produced a massive volume spike, which you can only see on the volume pane at real bottoms. The sellers were totally out of gas.

Then look at what happened the next several weeks. RSI began to improve. Volume picked up on the bullish days. ABNB made a higher low, followed by a move above 119. In October, it traded around 137.

All of the pieces were present and accounted for. A significant level being tested. The sellers giving up their position as evidenced by the volume. The momentum increasing. And the participation returning. This is alignment when it’s really working.

Factors align in a reversal, as shown by Airbnb above. Source: TradingView

That doesn’t mean you’ll find trades like this every week, you won’t. What I’m talking about here is looking for instances where you can find the alignment of different factors when one signal is confirmed by other independent signals. The more factors that support one another, the better the odds, yet nothing can ever be guaranteed, which is why you always must use a trading plan that considers the possibility that you are wrong (it happens). But the more you can get all these factors to come together, the more the odds can be in your favor, which in turn leads to success.

The Bottom Line

Volume is one of the simplest, but also perhaps most undervalued and underutilized tools in the trader’s toolbox. Often it is dismissed in favor of more complex, or “flashy” indicators. Why? It’s simple. Volume tells you one thing only, and that is if there is, or isn’t, any participation behind the movement you are viewing. To aid you with the basics of volume, here are some things to consider:

• Volume does not predict the direction of price action, but it provides context. While volume can show if a price move is supported by participation, it cannot predict where the price will move to next.
• Generally speaking, strong price trends are supported by strong volume. Rising volume on up days, and increasing volume on down days, are typical examples of this.
• Volume plays a role in breakouts and reversals to make them more or less significant. A breakout on high volume is more likely to be sustained over time than a breakout on low volume (but there is no certainty); pay attention to periods of price consolidation accompanied by low volume, which can then lead to expansion on high volume.
• The best results are achieved when you see all three key elements come together: price structure, momentum, and volume. These are the scenarios that will be most likely to favorably tilt the odds in your direction.

When I’m assessing any particular chart, I run through the following two questions:

– Is volume increasing or decreasing?

– Does volume confirm the trend, breakout, or reversal I am interested in?

With practice, it will eventually come naturally to you to identify the typical volume patterns associated with powerful trends, breakouts, and reversals. No indicator can ever predict the future with perfect accuracy, and neither can volume; however, through several years of trading, you will come to recognize the trades that are more likely to yield a positive outcome. In particular, trades where price and volume show strong and clear signals. Trades that may look great based on price alone, but do not have strong volume signals to support them? You can probably ignore those.