Market Accounts: These are typically used for rapid transactions, during which potential price changes are ignored. This allows for a smooth and fast trading process by permitting price slippage.

Instant Accounts: These allow for precise execution pricing by requiring the exact market price to be available. If the price no longer exists at the time of the transaction attempt, the terminal will issue a "requote," meaning it will request the price from the server again without executing the operation. This ensures highly accurate execution at the expense of generally longer execution times.