The setups so far bought declines. This lesson looks at a different moment: a stock that has gone quiet. Its daily ranges shrink, its moving averages flatten, and buyers and sellers appear to agree on the price. Such calm rarely lasts. When the balance breaks, the move that follows is often larger than anything in the quiet period, and because the quiet period gives a tight reference for the stop, the trade can offer a high ratio of reward to risk.
Volatility comes in clusters
Price changes are not independent from day to day in size, even if they are close to independent in direction. Large moves tend to follow large moves and small moves follow small ones. Benoit Mandelbrot described this clustering in commodity prices in 1963, and Robert Engle's ARCH model (1982), work later recognized with a Nobel prize, gave economists a way to measure it. Clusters end, however: quiet stretches are eventually broken by active ones, and the shift often comes abruptly.
For a swing trader, the practical rule is simple: contraction tends to precede expansion. The difficulty is equally simple: contraction says that a larger move is becoming more likely, not which way it will go. Every method in this lesson therefore needs a separate answer to the question of direction, usually the prevailing trend.
The Bollinger Band squeeze
John Bollinger's bands place lines two standard deviations above and below a 20-day simple moving average. Because the standard deviation measures how widely recent closes are spread, the bands widen when the stock is volatile and narrow when it is calm. BandWidth expresses that distance as a share of the middle band: (upper band − lower band) ÷ middle band.
In Bollinger on Bollinger Bands (2001), Bollinger described the squeeze: BandWidth falling to its lowest level in roughly six months. It marks a stock whose volatility is unusually low relative to its own history, which is a better comparison than an absolute number, since a utility and a biotech stock have very different normal ranges.
The squeeze carries a well-known trap, which Bollinger himself named the head-fake. The first move out of a squeeze often goes the wrong way: price pokes outside one band, draws in traders, then reverses and makes the real move in the opposite direction.
Traders deal with the head-fake in three ways: they trade only in the direction of the larger trend, they wait for a close outside the band rather than an intraday poke, and they exit quickly if price falls back to the middle band. Some also require heavier volume on the breakout day; the volume confirmation idea is covered in unusual volume.
Narrow-range days: NR7 and inside days
The squeeze measures contraction over weeks. Toby Crabel studied it over days. In Day Trading with Short Term Price Patterns and Opening Range Breakout (1990), he examined how the size of a day's range related to the next day's, mainly in futures, and described several patterns that are still widely used:
- NR7: a day whose range (high minus low) is the narrowest of the last seven sessions. NR4 is the same idea over four sessions.
- Inside day: a day whose high is below the previous high and whose low is above the previous low; the whole bar fits inside the one before.
- Combinations: a day that is both an inside day and the narrowest of several sessions represents an even tighter coil.
Crabel traded these patterns in both directions with an opening-range breakout: on the session after the narrow day, he entered when price moved a set distance above or below that session's open, and he got out quickly, at that day's close or the first profitable close. Swing traders adapt the idea: they take only the side of the larger trend, enter on a close above the narrow day's high, and hold longer with a target or a trailing stop. One feature carries over unchanged: a narrow-range breakout should work quickly. If price closes back below the narrow day's low, or simply goes nowhere for several sessions, the contraction has resolved without an expansion, or in the other direction.
What to expect from expansion trades
- Small risk, possibly large reward. The stop sits just beyond a narrow range, so a normal expansion can be worth several R.
- Many false starts. Narrow days are common; NR7 days alone occur roughly once in every seven sessions by construction. Most do not lead to a large move, and the trend filter does much of the work of separating the useful ones.
- Liquidity matters. In thinly traded stocks, narrow days often reflect a lack of participants rather than balance, and quiet pre-holiday sessions produce narrow ranges for the same reason.
- Context helps. Contraction near the top of a base in an uptrend, after the stock has absorbed a prior advance, is the classic location. Contraction in the middle of a downtrend says little about upside.
How to apply it
Squeeze breakout.
- Setup: BandWidth (20-day bands, two standard deviations) has set its lowest level of the last 125 sessions within the last five sessions.
- Entry: a close above the upper band while the squeeze holds; buy at that close.
- Stop and exit: the middle band on the entry day is the stop; afterwards, a close below the middle band ends the trade.
- Invalidation: skip breakouts against a falling 200-day average, and treat a quick return inside the bands as a head-fake.
An illustrative example: during a squeeze the upper band is $63.80 and the middle band $61.50. The stock closes at $64.10, so the entry is $64.10 and the stop $61.50; 1R is $2.60.
NR7 or inside-day breakout.
- Setup: an NR7 day or an inside day while the close is above the 50-day SMA and the 50-day is above the 200-day.
- Entry: the next session closes above the setup day's high; buy at that close.
- Stop: one cent below the setup day's low.
- Target and exit: 2R, or a trailing stop that rises with the trade.
- Invalidation: thin trading, a holiday-shortened week, or earnings due within days.
An illustrative example: an NR7 inside day has a high of $41.40 and a low of $41.05. The next session closes at $41.80, so the entry is $41.80 and the stop $41.04. 1R is $0.76 and the 2R target is $41.80 + $1.52 = $43.32. Note that the entry on the close is $0.40 above the trigger; a strong breakout day makes the actual risk larger than the narrow range suggests.
In Clear Tape
Two presets in trading systems follow this lesson. Band Squeeze Breakout uses the 20-day SMA as the middle band with bands two population standard deviations of the last 20 closes away, and BandWidth = (upper − lower) ÷ middle. The squeeze holds when, within the last five sessions (today included), BandWidth set its lowest level of the last 125 sessions, about six months. A close above the upper band during a squeeze is the entry, at that close; the stop is the middle band on the entry day, and a close below the middle band is the exit. There is no target of its own; the 2R level shown is for reference only. An optional volume check (at least 1.5 times the 50-day average) is not applied.
NR7 / Inside-Day Breakout marks a setup day whose range is narrower than each of the previous six sessions, or which is an inside day, while the close is above the 50-day SMA and the 50-day SMA is above the 200-day. It arms a buy-stop one cent above the setup day's high; the entry counts only when the next session closes above that high. The stop is one cent under the setup day's low, and once in the trade an ATR trailing stop, the 22-day high minus 3 × ATR(22), takes over whenever it is higher. The trade ends at the 2R target, reached when a day's high touches it, or at the stop or trailing stop. Each rule page lists its weaknesses: the head-fake for the squeeze; false triggers, illiquid stocks and quiet pre-holiday sessions for narrow-range days. Screening and backtests are available to Tools and Pro members.
Common mistakes
- Treating a squeeze as bullish. It is directionally neutral; the direction must come from the trend or from the breakout itself.
- Buying the first poke above the band without a close, or holding after price falls back to the middle band.
- Ignoring the gap between trigger and entry. When the breakout day closes far above the setup high, 1R is larger, and position size should be calculated from the actual entry.
- Trading every narrow day. Without a trend filter and adequate liquidity, narrow-range setups produce mostly noise.
- Waiting too long. An expansion trade that does not expand within a few sessions has lost its reason.
Summary
Volatility clusters, and unusually quiet periods tend to give way to larger moves. The Bollinger Band squeeze measures contraction over weeks; NR7 and inside days measure it over a day or two. Neither reveals direction, so these setups work best in the direction of the larger trend, with a stop just beyond the quiet range and a quick exit when the expansion fails. The next lesson covers what all these setups share: risk and trade management.
For educational purposes only. Not investment advice.