Block top - The block range and duration of your blockchain (in blocks) on generation of the present block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://socialbuzzfeed.com/story5731739/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-www-udrpsearch-com-user-lampwhorl2