Cryptocurrency is a digital currency that is secured by cryptography. One of its primary functions is to work as a medium of exchange within a peer-to-peer (P2P) economic system built on distributed ledger technology, which relies on cryptography to prevent frauds and counterfeiting. Most cryptocurrency systems are decentralized and maintained by a distributed network of computers (nodes) spread around the world.

Vertical bar graphs used in financial markets to indicate recent activity of the price of an asset - the top and bottom of the candlestick indicate the opening and close prices within a specified time window for the bar, and the lines that extend from it, known as wicks, indicate the total ranges, from high to low, within that time interval.

Files that store transaction data which is permanently recorded on a Blockchain. When a new transaction is created on a Blockchain, it is added to a block along with other new transactions. Once a block is added to a Blockchain, it is immutable.

When the block reward of a crypto asset, such as bitcoin, drops to one-half of what it was before; this is used to create a decaying rate of issuance to arrive at an eventual finite supply of a crypto asset.

A program trading platform which utilises the computational power of powerful computers in order to analyse multiple markets through the use of complex algorithms. Profitabilty of HFT is often tied to trade execution speed.