Auction market theory: how the market searches for a price both sides will accept

The market is neither “too expensive” nor “too cheap”. It's a continuous auction that constantly tests the price at which people want to trade. Auction Market Theory is the foundation of volume profile, Market Profile and order flow, so it's worth understanding before you start reading the footprint.

The market as an auction

In any auction, price rises as long as there are buyers willing to pay more, and falls as long as there are sellers willing to accept less. On a futures exchange this happens continuously: price moves up to test whether there are still buyers higher, and down to test whether there are still sellers lower. The purpose of the auction is to facilitate trade – to find an area where both sides are happy to do business.

Three concepts where it all starts

• Value. The price area where the market traded the most. In the volume profile it's the value area (VA), usually 70% of the session's volume, with the highest-volume price (POC) inside it.
• Acceptance. The market moves to new prices, stays there and builds volume. The new prices have been accepted as fair.
• Rejection. The market touches new prices but quickly comes back, on low volume. The new prices turned out to be too high or too low for the other side.

Balance and imbalance

The market spends most of its time in balance: it rotates around value, and buyers and sellers more or less agree on price. Every so often new information or one side's dominance appears and the market moves into imbalance: it travels quickly in one direction until it finds a new area where trade is easy again. Then it builds new value there. This cycle – balance, directional move, new balance – repeats on every scale: within a minute, a day and a week.

Why an auction ends

A move up ends when there are no more buyers at higher prices – not when “sellers show up”. On the chart this appears as exhaustion: less and less volume at each new high. Sometimes it's the other way round: heavy buying volume hits passive sell orders that absorb it, and price stands still. That's absorption. Both are easiest to see in exchange order flow data, where every trade is tagged with the aggressor side.

What it looks like on MYM

• Before the session I mark where value was on the previous day and week. That's the map on which today's auction will play out.
• At the open I look at whether the market opens inside or outside value. An open outside value raises the question: will the new prices be accepted, or will the market return to the old value?
• During the day I ask at every important level: acceptance or rejection? The answer comes from how price behaves over the following minutes, the volume and the order flow – not from the mere touch of the level.

Why this only works on a real market

Auction market theory describes the behaviour of all participants in one market. In CME futures everyone trades in one central order book, and volume is the real number of contracts. With CFDs or forex at a broker there is no single auction – just one provider's price feed – so the volume profile and acceptance have to be guessed.

Exercise

Open the previous day's chart and mark the value area. Find two moments when price left that area. For each, write down whether it was acceptance or rejection, and how you could tell. This is the basic habit on which I build all my market reading.

Educational content, not investment advice. No signals, entries or position sizes.

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