Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction range for that from address (Remember this starts off at 0 so a nonce of a hundred would basically be the 101st transaction submitted by this account) https://apollobookmarks.com/story20349482/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979