Definition · Technical Analysis
Breakout in Trading: Definition, Volume and the Measured Move
A breakout in trading is price pushing through a level that had held, and staying through it. The push is easy to spot; confirming that it will stick is the work.
DefinitionSeen on: Chart
Breakout A move through a price level that had held, usually resistance above or support below, which traders read as the start of a new leg in the direction of the break.
Also called price breakout, resistance breakout, breakdown (on the downside).
Buy the close above resistance, on heavy volume, and put the stop back inside the range. That’s the breakout trade in one line. Breakouts fail often. Each piece of the rule is there to tell you quickly when one has.
What counts as a breakout
A breakout needs a level first. Resistance is a price where selling has turned the stock back more than once. Support is where buying has held it up. The longer a level holds and the more times it gets tested, the more traders watch it, the more buy stops and sell orders collect just beyond it, and the more force a move needs to get through all of them and keep going.
When price moves through resistance and closes above it, that’s a breakout. Through support, traders usually call it a breakdown. Same idea, other direction.
A worked breakout and measured move
The measured move adds the pattern’s height to the breakout level. It is a rough guide to where the first leg might run. Plenty of breakouts stop short of it and plenty run past it. Use it to judge whether the trade is worth taking: with a stop at $73, back inside the base, the risk from $76.10 is $3.10 a share against $5.90 of room to the target, since $82 - $76.10 = $5.90.
That risk figure sets the share count. The position size calculator does it for any account.
Confirming it: the close, the volume, the retest
A close beyond the level. A poke above $75 that closes at $74.50 is a failed test. It counts as a fourth rejection. The close is what counts, on whatever bar length you trade.
Volume above average. A breakout is buyers overwhelming the sellers who have defended a level. If volume on the break is light, there were few sellers left to overwhelm or few buyers doing the pushing, and either way the move has less behind it.
The level holding on a retest. Many breakouts pull back to the old resistance within days. If $75 holds as support and price turns up from it, the old ceiling has become a floor, and that is the strongest confirmation of all, though it arrives last.
How it shows up on a chart
On a daily chart a breakout is a long bar pushing out of a sideways box, with a tall volume bar underneath it. Volume panels usually carry their own moving average, often over 50 days, and that line is the average the breakout bar gets compared against when traders say volume came in heavy or light on the day of the break. Draw the level as a horizontal line beforehand. Then the break is obvious when it comes. Some patterns are breakout setups by design: a flat base, an ascending triangle, the handle of a cup and handle, or the first half hour’s opening range on an intraday chart.
Failed breakouts
A failed breakout is price closing back inside the range after the break. Buyers who bought the close above $75 are now holding a losing trade, their stops are sitting just under the level or inside the base, and if price keeps falling those stops turn into sell orders that push it lower still, which is exactly the move a trader on the other side has been waiting to sell into.
That makes failure a setup of its own. Short-term traders fade failed breakouts. They sell when price drops back inside, with a stop above the failed high. Telling a real break from a failing one in real time is the subject of breakout or fakeout.
What people get wrong
Buying the first tick through the level is the most common one. Ignoring volume is next. The third is treating the measured move as a forecast, then holding a trade that has stopped working because the target has not been reached yet.
A last one: calling every move to a new high a breakout. A level only means something if it held before.
Related terms
Resistance, support, base and retest all appear above. A breakout that works usually starts a run of higher highs and higher lows. More chart basics sit under the technical analysis topic.
Questions traders ask next
How much volume confirms a breakout?
There is no official figure. Many traders look for volume at least well above the stock's recent average, often judged against a 50-day volume average shown under the chart. What matters most is the contrast: quiet volume while the base forms, then a clear jump on the day price closes through the level.
Should I buy a breakout or wait for the retest?
Buying the breakout close gets you in every move that runs, including the ones that never look back. Waiting for a pullback to the old level gives a tighter stop and filters out some failures, at the cost of missing strong moves that never return. Some traders split the position, buying half on the close and half on a retest.