Piercing Lines and Dark Cloud Covers
Two-bar patterns defined by how far the second session recovers into the first. The threshold is a convention, and the degree is the information.
MadStockAlerts Research · Updated August 28, 2026
What to take away
- The second bar opens beyond the first and closes well back inside it.
- The conventional threshold is a close past the midpoint of the first body.
- The threshold is arbitrary; the extent of the recovery is what varies continuously.
- It is a weaker version of an engulfing bar, which recovers the whole session.
- The same location and volume considerations apply.
MAD Academy Training Video · 0:46
How Far Into the Last Candle?
These two patterns are defined by depth of penetration, and the halfway mark is what separates a signal from an ordinary session.
This lesson is part of a Stock Alerts + Tools plan.
The definition
| Piercing line | Dark cloud cover | |
|---|---|---|
| Context | After a decline | After an advance |
| Second bar opens | Below the first bar's low | Above the first bar's high |
| Second bar closes | Above the midpoint of the first body | Below the midpoint of the first body |
| What it describes | A gap down that was bought back | A gap up that was sold into |
The last row is the whole content. Price opened away from the previous session and spent the day moving back through it, which is a description of the opening move being rejected.
The threshold is a convention
Requiring a close past the midpoint is a rule of thumb rather than a property of anything. A close at forty-nine percent of the previous body and one at fifty-one percent describe almost identical sessions, and the pattern exists in one case and not the other.
The underlying quantity is continuous: how much of the previous session was recovered. Reading it that way is more informative than a binary test, and it makes the relationship to the engulfing bar obvious, since that is simply the case where the recovery reaches one hundred percent.
Scroll the chart sideways to see all of it.
The gap requirement
Both patterns require the second bar to open beyond the first bar's range, which is a gap. That makes them subject to the same caveat as island reversals: they exist on a chart with extended hours excluded and largely disappear on one with them included.
In markets that trade continuously, such as futures and currencies, gaps of this kind occur only across a weekend or a session break, which is why the pattern is far less common there.
What to read instead
- How far into the previous session the close reached, as a percentage rather than as a threshold.
- Whether the level being reached is one that has held before.
- Volume relative to the security's own average, which says how many participants were involved.
- Whether it occurred after an extended move, which is the location condition every candle pattern depends on.
Reading the gap that opens the second session
The pattern requires the second session to open beyond the first, and what caused that opening is a separate and checkable fact.
| Cause of the gap | What follows from it |
|---|---|
| Company-specific news | A repricing. The recovery through the session is participants disagreeing with it |
| A sector or market move | The security followed. The recovery may say more about the market than about it |
| No identifiable cause | An imbalance rather than information, which is the most reversible kind |
| A scheduled event | The gap is the event being priced, and the recovery is the second opinion |
The third row is the case in which the conventional reading is strongest, and it is also the one that requires checking rather than assuming. A gap with no news is a different event from a gap on a disclosure, and the chart shows the same shape for both.
The gaps article makes the same point about classification. What is observable at the time is the cause, the size relative to the security's usual range, and the volume, and those three are available on the day rather than in retrospect.