The digital list of available orders for an asset or security that is arranged in increasing or decreasing order of price.

An order book refers to the electronic or digital list of available orders for an asset or security. This list contains two order classes: buy and sell orders. On an exchange, these order classes are clearly distinguished in colors and have different price ranges, although these differences are not always excessive. On Kyrrex Exchange, for example, buy orders are in green and sell orders are in red.

Apart from classification by order type, the main characteristic of an order book is that the list of open orders is organized by price in ascending or descending order.

An order book essentially allows a trader to know the different price conditions for buying or selling an asset. Thus, the trader can match orders manually or via an algorithm made available by the exchange platform.

A block without ancestry on a blockchain network, one that has been discarded.

An orphan block is a special kind of block on blockchain networks because they don’t seem to belong. Such a block may either contain no historical information, meaning that it has no parent block in the form of a connection to a block that was mined before it or has been discarded because of a similarly mined block. In both cases, an orphan block has no active use on the blockchain because it is irrelevant.

Orphan blocks are not possible currently, although they used to exist. However, these blocks occur from time to time when two blocks with the same information are broadcast to nodes at the same time. One is eventually validated and added to the network, while the other is discarded, making it an orphan block.

A data source or structure used for efficient organization of accurate data.

An oracle in cloud computing generally refers to a special data structure that transforms into a data source because it is flexible and easy to use. It is coined from Oracle Cloud, the name of cloud computing service used for data computing, storage, and networking. However, in crypto, oracles are data sources that serve as intermediary components between smart contracts and needed third parties that provide accurate information.

There are different types of oracles in crypto. A common one is the inbound oracle which is used to connect a smart contract to an external source, and create an order based on set conditions following the information from the external source. ChainLink (LINK) is a popular decentralized oracle network that provides secure inputs and outputs for smart contracts on compatible blockchains.

Order Book

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