An unfinished auction is a swing high or low where the market left before the job was done. On the footprint, the extreme row traded on only one side, no opposing aggression at the very top or bottom, so the level was never fully rejected. Those unfinished highs and lows act like magnets: price has a strong tendency to return and finish them, trading the missing side before moving on.
This is one of the cleanest, most tradeable footprint signatures, and it comes straight out of how auctions actually turn. If you want the full pattern catalog it sits in, see footprint chart patterns; here we take the unfinished auction apart on its own.
Finished vs unfinished, on the cells
Every swing extreme is a turn in the auction. What the footprint tells you is how it turned.
An extreme finishes when the turning row trades on both sides. At a high, the top row shows both aggressive buying (ask) and aggressive selling (bid), buyers pushed up into it, sellers hit it, and the two-sided print means the level was fully auctioned and rejected. Both sides had their say at the top before price fell away.
An extreme is unfinished when the top row printed with aggression on only one side. Say NQ makes a high at 19,880 and the top row shows only buying at the ask, 0 x 240, with no selling above it. Buyers ran the price up and then it reversed, but sellers never got to transact at that top tick. The auction turned before it completed. Same at a low: an unfinished low shows only selling at the bid on the bottom row, no buying beneath it.
The shorthand: a finished extreme has trade on both sides of the turning row; an unfinished one has trade on only one.
Why unfinished auctions get revisited
Markets are auctions, and an auction’s job at an extreme is to find the price where the other side steps in and rejects it. A finished high did that, sellers showed up, the level was proven. An unfinished high did not, price simply ran out of buyers for a moment and turned, but no seller ever tested whether that top tick was fair.
That leaves the auction with unresolved business. Left unfinished, the level tends to draw price back so the missing side can transact and the auction can complete. It is not a mechanical law, but it is a strong, repeatable tendency, and it makes unfinished extremes some of the highest-quality magnet levels the footprint hands you.
Think of it as the market wanting to double-check a price it left too quickly. Until it does, that level sits there unresolved.
How to trade an unfinished auction
The pattern gives you two things: target levels and reaction levels.
As a target (magnet). When you mark an unfinished high or low, you have a natural objective for the next move in that direction. If NQ left an unfinished high at 19,880 this morning and price is now grinding back up, 19,880 is a logical target, the market is likely to revisit and finish it.
- Mark the unfinished extreme as it prints. Note the exact price of the one-sided turning row.
- Use it as a target, not an entry. Take a long toward an unfinished high, or a short toward an unfinished low, sitting above/below.
- Watch what happens on arrival. When price gets back to the level, the auction usually finishes, the missing side finally trades, printing a two-sided row.
As a reaction level. The revisit itself is a decision point. Once price returns and the auction finishes, that unresolved business is gone, and price often reverses away from a now-completed extreme. So the finish can be your exit on the move into it, and sometimes a fade entry in the other direction, especially if the finish shows absorption of the aggressors who pushed price back there.
A worked read: ES prints an unfinished low at 5,388 mid-morning, bottom row 310 x 0, aggressive sellers with no buying beneath. You mark it. An hour later price sells off again toward 5,388. You are not shorting into it, you are watching for the finish. Price tags 5,388, the bottom row now prints two-sided as buyers finally step in, and delta diverges. The auction finished, and the level that was a magnet is now a place to look for a long.
Filtering: not every one-sided row counts
Unfinished auctions are only useful if you keep the bar high. Two filters matter.
- It has to be a genuine swing extreme. A one-sided row in the middle of a fast move is not an unfinished auction; it is just thin trade. The pattern only means something at an actual high or low where price turned.
- Size and clarity. A
0 x 4top row is technically one-sided but meaningless. You want real aggression on the one side and a clean absence on the other. Set a minimum so noise does not litter your chart with fake unfinished levels, the same discipline you apply to imbalances and every other footprint signal.
And, as always, context outranks the pattern. An unfinished high that sits right at a session VAH or a composite high volume node is a far stronger magnet than one floating in open space. Line the unfinished level up with your volume profile structure and you have a target worth trading toward.
Mark your unfinished highs and lows through the session and you build a running set of magnet levels for free. Combined with the rest of the footprint read, imbalances, absorption, delta, they turn into a genuine edge. The way it all fits together is in the order flow trading guide.
Frequently Asked Questions
What is an unfinished auction?
It is a swing high or low where the extreme row on the footprint traded on only one side, with no opposing aggression at the very top or bottom. That means the level was never fully rejected, the auction turned before it completed, so price tends to return later to finish it by trading the missing side.
How do I spot an unfinished auction on a footprint?
Look at the turning row of a swing extreme. If the top row of a high shows only buying at the ask with nothing selling above (or a low shows only selling at the bid with nothing buying below), it is unfinished. A finished extreme, by contrast, trades on both sides of the turning row.
Why does price come back to an unfinished auction?
Because the auction left unresolved business. At the extreme, no opposing side tested whether that price was fair, so the market tends to draw price back to let the missing side transact and complete the auction. It is a strong tendency rather than a guarantee, which is why unfinished highs and lows work well as magnet levels.
How do I trade an unfinished high or low?
Use it as a target rather than an entry: trade toward the unfinished level as a magnet, then watch the revisit. When price arrives and the auction finishes, printing a two-sided row, that is often your exit, and sometimes a fade entry the other way if the finish shows absorption. Weight levels that line up with volume profile structure.