Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that 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://followbookmarks.com/story20321432/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-intensedebate-com-people-hawkwhorl3