Elon Musk talks Crypto：Oracles

One Cancels the Other Order (OCO)

A situation where two orders for cryptocurrency are placed simultaneously, with a rule in place to enforce that if one is accepted, the other is cancelled.

OpenSea

OpenSea is a decentralized P2P platform for NFTs.

Open Interest

Open interest refers to the total number of outstanding derivative contracts, specifically futures and options, that are held by market participants at the end of each trading session.

Open Source

Open source is a philosophy, with participants believing in the free and open sharing of information in pursuit of the greater common good.

Open/Close

The price at which a cryptocurrency opens at a time period or the programming principle of software parts being extendable.

Opera Mainnet (Fantom)

Opera (Fantom) is a permissionless, open-source framework that allows everyone to engage in the network through staking and governance.

Operating System (OS)

An operating system (OS) is a software and a resource manager that sits between the hardware and the user.

Optimistic Oracle

An optimistic oracle uses a dispute/arbitration process to ensure data accuracy. This compares to a price-feed oracle, which relies on nodes to provide consistent price feed data on-chain.

Optimistic Rollup

An optimistic rollup is a type of layer-2 scaling solution that relies on off-chain computation to record transactions in layer 2 trustlessly.

Option

A contract giving the buyer the right, but not the obligation, to buy or sell an underlying asset or instrument at a specified strike price.

Options Market

A public market for options, giving the buyer an option to buy or sell a cryptocurrency at a specific strike price, on or before a specific date.

Oracle Manipulation

Oracle manipulation is when an oracle smart contract is manipulated by hackers.

Oracles

An agent that finds and verifies information, bridging the real world and the blockchain by providing data to smart contracts for execution of said contracts under specified conditions.

Order Book

An order book comprises different key information regarding an asset.

Orphan

A valid block on the blockchain that is not part of the main chain.

Orphaned Block

An orphaned block is a block where the parent block does not exist or is unknown.

Ouroboros Praos

Ouroboros Praos is a proof-of-stake consensus mechanism developed by IOHK and is an updated version of Ouroboros Classic.

Passive Income

Passive income is money produced from investments that do not require the earner to be actively involved.

Over-Collateralization

Over-collateralization (OC) is the provision of collateral that is worth more than enough to cover potential losses in cases of default.

Over-the-Counter (OTC)

Over-the-counter is defined as a transaction made outside of an exchange, often peer-to-peer through private trades.

Over-the-Counter (OTC) Trading

Over-the-counter refers to the process of how securities are traded through a broker-dealer network as opposed to a centralized exchange.

Overbought

When a cryptocurrency has been purchased by more and more investors over time, with its price increasing for an extended period of time.

Oversold

When a cryptocurrency has been sold by more and more investors over time, with its price decreasing for an extended period of time.

Pegged Currency

A stablecoin is a currency whose value is pegged to a real-world asset, such as a fiat currency.