user4819: I'm using the Blockchain exchange rate API to add a Bitcoin exchange rate calculating function to one of my apps.  I'm not sure which value I should be using.  For each currency type (USD, EUR, etc.) four different rates are returned: "last," "buy," "sell," and "24h."

user6256: Most people are interested in the last value or the 24 hour average, it depends on the purpose of the application and the intent of the developer.

4819: <p>I'm using the <a href="https://blockchain.info/api/exchange_rates_api" rel="nofollow">Blockchain exchange rate API</a> to add a Bitcoin exchange rate calculating function to one of my apps.  I'm not sure which value I should be using.  For each currency type (USD, EUR, etc.) four different rates are returned: "last," "buy," "sell," and "24h."</p>
 6256: <p>Most people are interested in the last value or the 24 hour average, it depends on the purpose of the application and the intent of the developer.</p>
