Block top - The block selection and length from the blockchain (in blocks) on development 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://socialeweb.com/story5945724/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com