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An Order Book is a list of open or outstanding orders for trading pairs. All order books typically share price, amount, the buy side, and the sell side.

Order book DEXs and AMMs are both widely used for on-chain asset trading, but they differ clearly in how prices are formed, how liquidity is structured, and how trades are executed. An order book DEX matches trades through buy and sell orders placed by users, while an AMM relies on liquidity pools and algorithms for automatic pricing.

DearBook.AI (DEARBOOK) is the first children's book creation platform driven by Solana blockchain and AI technology. Whether it's parents, educators, or children themselves, they can transform their ideas into personalized children's books through DEARBOOK. This article will provide a detailed introduction to what DEARBOOK is, its usage, development roadmap, community building, and market performance, etc.

dYdX and Hyperliquid are both order book-based DEXs focused on on-chain perpetual futures trading, so they are often compared with each other. Although both emphasize a high-performance trading experience and low-latency matching, they differ significantly in their underlying chain structure, degree of decentralization, liquidity sources, and governance models. dYdX uses an appchain architecture built on the Cosmos SDK and secures its network through PoS validator nodes, while the DYDX token is used for both governance and staking. Hyperliquid, by contrast, uses a self-developed high-performance chain structure and places greater emphasis on ultra-low-latency trading and a unified liquidity experience.

Both 0x Protocol and Uniswap are designed for decentralized asset trading, but they use distinct trading mechanisms. 0x Protocol relies on an off-chain order book architecture with on-chain settlement, aggregating liquidity from multiple sources to deliver trading infrastructure for wallets and DEXs. Uniswap, meanwhile, adopts the Automated Market Maker (AMM) model, facilitating on-chain asset swaps through liquidity pools. The primary difference between the two is how liquidity is organized. 0x Protocol focuses on order aggregation and efficient trade routing, making it ideal for providing foundational liquidity support to applications. Uniswap leverages liquidity pools to offer direct swap services to users, positioning itself as a robust on-chain trade execution platform.

Injective (INJ) is a Layer 1 public blockchain built around on-chain financial use cases. Its design focuses on improving the efficiency of decentralized trading systems, cross-chain asset movement, and compatibility with financial applications. Unlike traditional DeFi-focused blockchains, which mostly rely on the AMM model, Injective places greater emphasis on on-chain order books, low-latency trading, and modular financial infrastructure.

Lighter is a perpetual contract trading protocol built on Ethereum. Utilizing a dedicated zk-rollup and a verifiable matching engine, it seeks to overcome persistent performance, security, and fairness bottlenecks in decentralized order books. Backed by significant funding, accelerating trading volumes, and the recent introduction of the LIT token mechanism, Lighter is steadily carving out its niche in the decentralized derivatives market.

Unlike centralized exchanges that use order book matching, OTC transactions bypass the public order book entirely. Both parties negotiate prices directly, usually conducting larger trades with greater privacy.

SoSoValue has officially launched its high-performance Layer 1 blockchain, ValueChain, along with its core trading subchain, SoDEX. The mainnet is now fully accessible to all users—no invitation code required. Additionally, the platform token SOSO has completed a key upgrade, becoming the native gas and governance token for ValueChain. This upgrade is paired with a new Public Launch initiative, bringing substantial incentive resources to the ecosystem.

Orderly Network provides users with spot and perpetual contract trading by utilizing a unified order book and cross-chain liquidity.

Space and Polymarket are prediction market platforms. Space prioritizes order book trading, leverage, and incentive mechanisms on Solana, whereas Polymarket centers on established event markets, CLOB trading, and a results token framework.

The Bome project, or Book Of Memes, is an experimental Meme project that combines blockchain technology, decentralized storage, and trading to immortalize memes.

The core difference between Injective vs Sei is that Injective leans more toward on-chain financial infrastructure and order book trading, while Sei places greater emphasis on a high-performance EVM execution environment and parallelized transaction processing.

Zeta Markets is one of the rapidly growing decentralized derivative protocols. Recently, this perpetual contract DEX, which uses on-chain central limit order book (Clob) technology in the Solana ecosystem, has attracted a lot of user attention.

This article provides a detailed analysis of the liquidity challenges faced by traditional DEXs and how the new generation of order book DEXs, like dYdX and Antarctic, are reconstructing liquidity power distribution through hybrid models, privacy protection, and liquidity stratification.