Glossary · Swing Trading
Inside Bar: The Narrow Day That Sets a Breakout Level
An inside bar is a day that stays within the range of the day before. It is small and easy to miss, and it hands you two exact prices to trade from.
Definition
Inside bar A price bar whose high is below the previous bar's high and whose low is above the previous bar's low, so its whole range sits inside the bar before it.
Also called Inside day.
Order type: buy stop. Trigger: just above $50.40. Protective stop: just below $49.20. That ticket comes straight off two daily bars. The narrower one is the inside bar.
Spotting one
Compare each bar with the one before it. A lower high and a higher low make today an inside bar. The bigger bar that contains it is usually called the mother bar.
The check is strict. A bar that matches the prior high exactly, or dips a cent below the prior low, is not an inside bar under the textbook definition, though some traders allow equal highs or lows. Pick a version and stick to it.
What the pattern shows is contraction. The market covered a range on one day, then traded a smaller range entirely within it on the next, which means neither buyers nor sellers could push past the prior day’s extremes. Contraction tends to be followed by expansion at some point. The inside bar tells you where the expansion would have to start.
Trading the break
The standard use is simple. A move above the inside bar’s high is a long signal. A move below its low is a short one. Whichever side breaks, the opposite side of the inside bar becomes the stop reference.
The risk is about $1.20, plus whatever few cents you leave above and below the levels, and once that distance is fixed the swing trade risk calculator converts it into a share count for the dollar amount you are willing to lose.
Some traders use the mother bar instead. They enter above $51.00 and stop below $48.00. That is a wider stop and a smaller position for the same dollar risk. It filters out some false breaks. It also gives up part of the move before you are in.
A buy stop can fill well above its trigger if the stock gaps open through the level, so check the fill on your statement against the trigger price and measure the trade’s real risk from where you actually got in.
Context decides
An inside bar in the middle of a sideways range means very little. Price is contracting inside a larger contraction, and a break of a narrow day’s high in that setting often runs straight into the top of the range and stalls.
The classic use is different. A stock is in an uptrend, it has pulled back toward its last swing low, and it prints an inside bar as the selling dries up; a break above that inside bar’s high is the first sign that buyers have returned, and the stop under its low sits close to the swing low that defines the trend in the first place, so the trade has a tight, logical risk. That combination is why inside bars come up so often in pullback entries.
Inside bars in the direction of a strong trend can also work as continuation setups, with the narrow day acting as a brief pause before the next leg. Against the trend, they deserve more suspicion.
Timeframe changes the picture as well. A daily inside bar can sit inside a weekly downtrend. Check the weekly chart first.
Where it shows up
Many charting platforms can screen for inside days. Some mark them automatically. On a plain candlestick chart you can spot them by eye. Look for a short candle tucked inside the one to its left.
Check the earnings calendar before trading one. An inside bar the day before a report may only reflect traders waiting, and any break after the report is a reaction to the numbers, with a gap that can skip past both your entry and your stop.
What people get wrong
The frequent mistake is trading every inside bar. Narrow days are common. Without a trend or a level behind them, many breaks go nowhere. The second is a stop placed a cent under the low. Ordinary noise takes it out. The third is forgetting that a break in one direction can reverse and break the other side the same day, which is why some traders wait for a close beyond the level.
Related terms: mother bar, outside bar, swing high and swing low, and range contraction. More setups are gathered on the swing trading topic page.
Readers also ask
Is an inside bar bullish or bearish?
It has no direction of its own. It shows a narrowing range and sets two levels, its high and its low, and the direction of the break decides the trade. Context gives it a lean: after a pullback in an uptrend it is usually traded for a break higher, and in the middle of a range it carries little meaning.
What is the difference between an inside bar and an outside bar?
An inside bar has a lower high and a higher low than the bar before it, so its range fits within the prior bar. An outside bar is the reverse, with a higher high and a lower low that swallow the previous bar's range. One shows contraction and the other shows expansion.
What timeframe works best for inside bars?
The pattern reads the same on any timeframe, from intraday charts to weekly bars. Swing traders often use daily bars, where each bar is a full session, and look up to the weekly chart for context. On very short timeframes narrow bars appear constantly and carry less weight.