- 2FA (two-factor authentication)
- A second check at login in addition to the password, usually a short code from an authenticator app or a hardware key. If the password leaks, the account still needs that second factor. App-based codes are harder to intercept than SMS codes.→ Crypto 2FA: Authenticator App, SMS, Passkey and Reset Steps
- BDR (Brazilian Depositary Receipt)
- A certificate listed on Brazil's B3 exchange that represents shares of a foreign company, such as a US tech stock. It trades in Brazilian reais, so the investor does not need to send money abroad. The price follows the original share plus the exchange rate.→ US Stocks for Beginners: How to Invest from Outside the US
- ETF (exchange-traded fund)
- A fund that holds a basket of assets and trades on a stock exchange like a single share. One purchase gives exposure to many companies or to an index. Some ETFs track bitcoin or other crypto prices without the buyer holding the coins directly.→ US Stocks for Beginners: How to Invest from Outside the US
- Fee rebate
- Part of the trading fee returned to the trader, often linked to signing up with a referral code or reaching a volume tier. The rebate may come back as cash, as a fee discount, or as vouchers. Terms and expiry dates differ by exchange.
- Futures
- Contracts that let a trader bet on the future price of an asset without owning it. On crypto exchanges the most common type is the perpetual contract, which has no expiry date. Futures can profit from falling prices, and losses can grow fast.→ Crypto Futures and Leverage: Margin, Liquidation, Fees (2026)
- Limit order
- An order to buy or sell only at a chosen price or a more favorable one. It waits in the order book until the market reaches that price, and it may never fill. Limit orders that add liquidity usually pay the maker fee.
- Maker fee
- The fee charged when an order adds liquidity to the order book, typically a limit order that does not fill right away. Exchanges often set it lower than the taker fee. The exact rate depends on the exchange and the account tier.
- Market order
- An order that buys or sells immediately at the current available price. It fills fast, but the final price can differ from the price on screen, especially in thin markets. Market orders pay the taker fee.
- MiCA (Markets in Crypto-Assets)
- The European Union's rulebook for crypto service providers and stablecoin issuers. Firms need a license to serve EU users, and stablecoins must hold full reserves. It explains why some tokens are not offered on EU-regulated platforms.→ What Is a Stablecoin? USDT vs USDC Explained for Beginners
- Network (blockchain / chain)
- The blockchain a transfer travels on, such as Ethereum, Tron, BNB Smart Chain or Solana. The same coin, for example USDT, can exist on several networks. Sending on a network the receiving side does not support can mean losing the funds.→ Crypto Wallet Basics: Custodial vs Self-Custody, Hot vs Cold
- Order book
- The live list of open buy and sell orders for a trading pair, sorted by price. Buy orders sit on one side, sell orders on the other. The gap between the highest buy price and the lowest sell price is called the spread.
- P2P trading
- Buying or selling crypto directly with another user, paying through a local bank transfer or payment app. The exchange holds the seller's crypto in escrow until the payment is confirmed. Fake payment proofs and off-platform chats are the most common scams.→ P2P Crypto Trading Safety: Escrow, Common Scams and How to Appeal
- Proof of reserves
- A report in which an exchange shows that the assets it holds cover the balances of its users. It is often built with a Merkle tree so each user can check that their own balance is included. A snapshot does not show debts or what happens after the report date.→ Proof of Reserves Explained: How to Check an Exchange in 2026
- Protection fund (SAFU)
- A reserve an exchange sets aside to compensate users after a hack or a major failure. Binance calls its fund SAFU; other exchanges use names like protection fund. How it is funded and when it pays out is decided by each exchange.→ Proof of Reserves Explained: How to Check an Exchange in 2026
- Referral code
- A code entered at sign-up that links a new account to the person or site that shared it. The new user may get a fee discount or welcome reward, and the sharer receives a commission. Most exchanges only accept it during registration.
- Taker fee
- The fee charged when an order fills immediately against an order already in the book, such as a market order. It is usually higher than the maker fee. Frequent traders feel this difference the most.
- Volatility
- How much and how fast a price moves up and down. Crypto prices usually swing more than stocks or currencies within the same day. Higher volatility raises both possible gains and possible losses.
- Withdrawal
- Moving funds out of an exchange, either as crypto to a wallet or as local currency to a bank account. Exchanges charge a withdrawal fee and may hold requests for security review. A wrong address or network on a crypto withdrawal usually cannot be reversed.