Full-range liquidity is the original AMM liquidity model where provided capital is distributed across all possible price ranges — from zero to infinity. This is how traditional constant product AMMs (like Uniswap v2 and Raydium AMM v4) work.

In full-range pools, the same capital must cover every possible price, which means most of it is idle at any given time (deployed at prices far from the current price). This is less capital-efficient than concentrated liquidity but simpler to manage.

Full-range liquidity never goes 'out of range' — the position always earns fees regardless of how far the price moves. This makes it lower maintenance than concentrated liquidity positions, at the cost of lower fee yield per unit of capital.