Mastering volume bars – How to read and use volume bars!When it comes to trading, price action often takes the spotlight, but volume is the quiet force behind the scenes that tells the real story. Volume bars show how much trading activity occurs during a given time period and can offer valuable insight into the strength or weakness of a price move. In this guide, we’ll break down how to read volume bars, what the different colors represent, and how to use them to make more informed trading decisions. Whether you're a beginner or looking to sharpen your strategy, understanding volume is a key step toward becoming a more confident and capable trader.
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What will we discuss:
- What is the volume indicator?
- What are the green and red volume bars + the MA line?
- How does the volume indicator work?
- How to use volume during Support/resistance flips?
- How to use volume while trading pattern breakouts?
- How to use volume while trading inside a pattern?
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What is the volume indicator
The volume Bar indicator is a simple but yet essential tool that helps traders understand the level of activity behind every price movement. When you add the Volume Bar indicator to your chart, you will see vertical bars appear beneath each candlestick under in your chart. This represents the total volume during that time period. These bars show how much buying and selling occurred, but not whether it was mostly buying or mostly selling. The taller the bar, the more active the market was during that candle.
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What are the green and red volume bars + the MA line?
A green volume bar means the price closed higher than it opened during that period, indicating bullish sentiment and suggesting that buying pressure was stronger. A red volume bar means the price closed lower than it opened, reflecting bearish sentiment and suggesting that selling pressure dominated. While the volume itself shows how much was traded, the color tells you whether that activity occurred mostly during upward or downward price movement. It's important to note that the color doesn't directly show the number of buyers or sellers, since every trade has both.
The MA line in a volume bar indicator stands for “Moving Average.” It represents the average trading volume over a specific number of past periods, smoothing out short-term fluctuations to show the overall trend in volume activity. This helps traders see whether the current volume is unusually high or low compared to the average. For example, if the current volume bar is significantly higher than the MA line, it could signal strong interest or momentum behind a price move. Conversely, if volume is consistently below the MA line, it may indicate weak market participation or a lack of conviction behind recent price changes.
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How does the volume indicator work?
Using volume effectively in trading involves looking at how it behaves in relation to price. For example, if price is moving up and volume is increasing , that usually confirms strong buying interest, suggesting the move is valid. On the other hand, if price rises on low volume, it could be a sign of weakness or a potential reversal. The same logic applies to down moves, if price drops on high volume, it is more likely a strong selling move. If it drops on low volume, it could just be a temporary pullback.
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How to use volume during Support/resistance flips?
Volume can also play a key role when trading support and resistance levels. When the price breaks through a key resistance level with strong volume, it often signals a shift in market sentiment and increases the likelihood that this level will now act as support. The high volume behind the breakout indicates strong conviction from buyers, meaning bulls were actively stepping in to push price higher.
Because of this, if the price comes back down to retest that zone, it's likely that buyers will defend it, turning the former resistance into solid support. This concept is often referred to as a "break and retest" strategy, and volume is what helps confirm whether the breakout was strong enough to validate the level as a new base.
Without significant volume, the breakout might lack follow-through, and the price could easily fall back below the level, failing to establish it as support. But when the breakout is backed by high participation, the probability of that level holding increases. I’ve included an example to show exactly how this plays out in action.
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How to use volume while trading pattern breakouts?
When trading chart patterns, volume can be a powerful tool to confirm whether a breakout is genuine or likely to be a fake-out. Patterns like triangles, flags, head and shoulders, or rectangles often lead to breakouts, but not all of them are trustworthy. That’s where volume comes in.
If price breaks out of a pattern, it's important to look at the volume at that moment. A strong breakout is usually accompanied by a noticeable increase in volume. This surge in volume indicates that more market participants are getting involved, adding weight to the move. Essentially, higher volume reflects stronger conviction. It means traders aren’t just watching the breakout, they’re actively trading it.
On the other hand, if the price breaks out but the volume remains low or even drops, that’s a red flag. Low volume suggests a lack of interest or commitment, and the breakout may not have enough strength to continue. In such cases, the price might quickly fall back into the pattern, turning what looked like a breakout into a fake-out.
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How to use volume while trading inside a pattern?
You can also use volume to gain insights while the price is still developing within a chart pattern, such as a rising wedge. In these situations, volume can help reveal the strength, or lack of strength, behind the price movement, even before a breakout occurs.
For example, if the price drops sharply with high volume and then starts moving upward again in a rising wedge formation, but this upward move happens on low or declining volume, it can be a sign of potential weakness. The initial high-volume drop shows strong selling pressure, and the lack of buying volume on the recovery suggests that buyers are not fully supporting the move.
This imbalance between strong selling and weak buying can indicate that the upward movement is not sustainable. It often means the rising wedge is forming as a corrective or weakening structure, increasing the chances of a breakdown once the pattern completes. In this way, volume becomes a clue, not just for breakouts, but for spotting when a move might be running out of steam even before it happens.
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