Definition

Aggression

Orders demanding immediate execution, primarily market orders. Aggression consumes resting liquidity and can force price to relocate.

Full Explanation

Aggression is the active side of the transaction. A market order does not wait for a chosen price; it says, in effect, fill me now at the best price available. A market buy consumes sell-side liquidity at the ask. A market sell consumes buy-side liquidity at the bid.

This distinction matters more than simply saying 'buyers' or 'sellers.' Every completed trade has both. What changes price is the relationship between aggressive orders demanding execution and the resting liquidity available to absorb them.

If aggressive buying keeps arriving and available sell-side liquidity is insufficient, the ask relocates upward. If aggressive selling overwhelms buy-side liquidity, the bid relocates downward. When liquidity is deep enough to handle the aggression, price can remain nearly unchanged even while plenty of trading is taking place. Aggression is therefore not a directional prediction; it is a description of how an order is participating right now.

In the Book 1 chapter

Chapter 2 · The Mechanics

Liquidity and Aggression

Every single trade has a buyer and a seller. That’s not an insight — it’s just math. For any transaction to happen, someone has to buy and someone has to sell. Which means that when you hear “buyers are in control right now” or “sellers are pushing price down,” you should pause for a second, because those phrases are telling you less than they sound like they are.

From the Blog 6 posts

Describing vs. Predicting: The Trader's Discipline

Learn why describing what price is doing beats predicting what it will do next—and how this shift transforms your trading.

Absorption: When Aggression Arrives and Nothing Happens

Absorption is the mechanical event where market orders meet enough resting liquidity and price fails to move—understanding it changes how you read every consolidation.

"Failed Breakout" — A Phrase That Fails the Trader

The phrase 'failed breakout' attributes intent to price. Let's replace it with a mechanical description that actually helps you read the chart.

Why the Author Is Not the Authority

Trading education often becomes a personality cult. TTM reframes the guru trap, moving the authority from the author to the market's mechanical reality.

Why "Buyers vs. Sellers" Is the Wrong Frame

Every transaction has both a buyer and a seller. That's not insight — it's arithmetic. The question that actually matters is different, and until you're asking it, you're working with the wrong map.

What Is Aggression, Exactly

The word "aggression" gets used constantly. The concept behind it almost never gets examined. That gap is costing you.