A rate of a specified currency for converting all profits and losses into U.S. dollars.

In trading, correlation is a measurement of the relationship between two assets.

Decentralized means not controlled by any single entity or institution. Blockchain is an example of something that is decentralized, all full nodes in the network own a copy of the blockchain.

Normally, the contract price of a futures contract is higher than the current price of the underlying asset (normally a commodity). The futures contract price is higher because of the effect of the time value of money. As the expiration date nears, the spread between the spot price and the futures contracts price becomes smaller and smaller. On the delivery date of the contract, the futures and spot prices should be equal.

An agreement of trade.