A decentralized exchange (DEX) is a protocol where tokens trade peer-to-contract against onchain liquidity pools, with no central authority holding custody, matching orders, or controlling access. Trades settle on-chain through smart contracts that calculate output from pool reserves. Most new tokens trade here first.
Pool configuration at launch, reserve ratio, depth, and price range, decides price discovery in the first minutes and cannot be corrected after the token goes live.
How it works
DEXes run on a liquidity pool model, not an order book. Providers deposit token pairs and earn trading fees proportional to their share. When a user swaps, the AMM contract reads current reserves, deducts fees, updates reserves, and transfers tokens in a single atomic transaction.
Uniswap v2 established the constant-product (x times y equals k) model. Uniswap v3 and its forks added concentrated liquidity, letting providers set a price range for their capital and sharply increasing efficiency within that band.
Design consequence
With no gatekeeper, no pool-level KYC, and no listing delay after seeding, a new token's first price discovery happens where bots, snipers, and arbitrageurs operate within milliseconds of the pool going live.
The initial reserve ratio is not separate from the launch price. Seed a pool with 1,000,000 tokens and 10 ETH and the implied launch price is 0.00001 ETH per token. Adjusting the launch price means adjusting the reserve ratio at seeding. This is where paper design meets execution.
Common mistake
Teams underestimate launch-block MEV exposure. Sandwich and frontrunning bots scan the mempool for pool seed transactions and buy immediately ahead of them, capturing the move before any retail user can participate. Launching without an MEV-aware seeding strategy delivers a worse opening price than the model projected.
See Token Launch Strategy for how this applies in practice.
More in Launch and Markets
- Token generation event (TGE)
- TGE float
- Effective sellable float
- Initial coin offering (ICO)
- Initial DEX offering (IDO)
- Initial exchange offering (IEO)
- Automated market maker (AMM)
- Liquidity pool
- Concentrated liquidity (V3) versus constant-product (V2)
- Liquidity depth
- Slippage
- Price impact
- Market maker
- Buy pressure
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