Definition

Liquidity

Resting limit orders waiting at specific prices to transact. Liquidity provides the orders that aggression trades against.

Full Explanation

Liquidity is made of resting limit orders — participants willing to buy or sell, but only at prices they have chosen. Those orders wait until aggression comes to them. Buy limit orders provide liquidity below the market; sell limit orders provide liquidity above it.

Liquidity is what allows market orders to execute. When aggression reaches a price, the amount of liquidity available there helps determine what happens next. If enough opposing liquidity is present, the aggression is absorbed and price may stall. If the available liquidity is consumed, price must relocate to another price where more orders are available.

The important part is that liquidity is not a permanent property of a level. Participants can add, cancel, move, or replace their orders at any time. A price that contained aggression yesterday may be nearly empty today. The chart can show you the result of the interaction, but it cannot show you a complete, permanent inventory of what is waiting there 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 4 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.

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.