Gap classifier
Tell the five kinds of gap apart, which matters more in India than in most markets because our stocks gap almost daily.
Runs entirely in your browser — nothing you type is sent anywhere. Educational only, and not investment advice.
How to use this calculator
Each step names a control you will find on screen above.
- Cycle through the five types
Common, breakaway, runaway, exhaustion and the news gap. Each has a different implication and a different correct response.
- Read where each occurs
Position is what identifies a gap. The same size of gap means opposite things at the start of a move and at the end of one.
- Check the volume that came with it
A breakaway gap on heavy volume is a genuine repricing. The same gap on light volume is usually filled within days.
- Note the fill statistics
Common gaps fill most of the time. Breakaway gaps often do not. "All gaps get filled" is one of the market’s most confidently repeated wrong statements.
Worked example: The same 4% gap in two places
A stock gaps up 4% at the open. Compare it occurring after three months of sideways trade against occurring after a 60% run.
What to enter
- Gap type
- Breakaway, then exhaustion
What it shows you
- After a long range
- Breakaway
- After a long run
- Exhaustion
- Same size
- 4%, in both cases
- Correct response
- Opposite in each
on heavy volume, often the start
often the last buyers arriving
Where this is taught
A calculator gives you a number. These explain what the number means and when it misleads you.
- Technical Analysis10 minGapsThe Indian market is shut for 17 hours a day, so it gaps constantly. The five kinds, which ones fill, and why an unfilled gap becomes a level.
- Technical Analysis11 minCircuit limits, halts and when the chart stopsA price band means the stock can show a move you could not have traded. Where they apply, what they do to a stop-loss, and why smallcaps are worst affected.
- Technical Analysis12 minResults, budget and index rebalancingScheduled events break the assumptions technical setups rely on. What to do with a position running into earnings, and where event-driven flows create genuine edges.
- Technical Analysis11 minWhen news arrives without a dateScheduled events can be planned around. A regulatory order, a fire, a resignation cannot — and the first reaction is usually the wrong one to trade.
- Technical Analysis13 minA chart with no historyA demerged company lists on a Tuesday with no past at all. Every tool in this track needs a lookback window and there is not one, so the first weeks are read with borrowed structure or with none.