#OrderTypes101 * A transaction hash (or transaction ID/tx hash) is a unique identifier for a specific cryptocurrency transaction on a blockchain. It's like a digital receipt that proves a transaction has occurred and been recorded on the blockchain. You use it to look up transaction details on a block explorer.

Coin Pair (or Trading Pair):

* A "coin pair" (or "trading pair" or "cryptocurrency pair") is a combination of two different cryptocurrencies (or a cryptocurrency and a fiat currency) that can be traded against each other on a cryptocurrency exchange.