Ticker&TapeVolume on breakouts: the proof of demand
A breakout is when a stock clears the top of its base, the pivot. Price alone is not enough. The move should come with a clear surge in volume, which shows big investors are stepping in.
Why volume matters at the pivot
The top of a base is resistance. Investors who bought near the old high are waiting to sell at break-even. To push through that supply, a stock needs real demand. A surge in volume is the evidence that buyers are absorbing every share for sale.
When a stock pokes above its pivot on ordinary volume, nobody important may be buying. Those breakouts are more likely to slip back into the base.
How much volume is enough
A common guideline, popularized by William O'Neil, is that breakout-day volume should be at least 40% to 50% above the 50-day average. Many of the best breakouts trade two or three times normal volume.
During the session, project the full-day number. If a stock has already traded its normal daily volume by midday, it is on pace for roughly double. The relative volume panel on the chart makes this easy to track.
Dry-up before the breakout
The best breakouts usually follow a period of very quiet trading. In a cup with handle, volume should shrink near the bottom of the cup and again in the handle. In a flat base, look for a few days of very low volume near the lows of the range.
This volume dry-up tells you selling pressure has faded. The contrast matters: a stock that goes from quiet to loud at the pivot is showing a real change in demand.
What to watch after the breakout
- Follow-through in the next few days, ideally on above-average volume.
- Pullbacks on lighter volume than the breakout day.
- A close in the upper half of the day's range on the breakout itself.
- Warning sign: heavy volume on a drop back below the pivot.
Putting it to work
Set a pivot alert on the chart so you know when a stock is approaching its buy point, then check volume before acting. The ideas page lists stocks near a pivot each day. Remember that volume is one piece of evidence, alongside the base, the RS line and the general market.
Common mistakes
- Buying a breakout on below-average volume because the price looks right.
- Judging volume too early in the session without projecting the full day.
- Ignoring a base where volume stays heavy on down days instead of drying up.
Key points
- Breakout volume should be at least 40 to 50% above the 50-day average.
- Volume should dry up near the base lows and in the handle before the breakout.
- Low-volume breakouts fail more often, so treat them with caution.
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Check what you learned
Answer at least 2 of 3 correctly to complete the lesson.
1. What is the common guideline for breakout-day volume?
A clear surge in volume is the evidence that buyers are absorbing the supply at the top of the base. Many of the best breakouts trade two or three times normal.
2. By midday a breaking-out stock has already traded its normal full-day volume. What does that suggest?
Project the full-day number during the session. Reaching a normal day's volume by midday puts the stock on pace for about twice normal.
3. Why does a volume dry-up before the breakout matter?
Quiet trading near the base lows and in the handle shows sellers are exhausted. The contrast with heavy volume at the pivot is what matters.
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