Block top - The block selection and length 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://tbookmark.com/story20171870/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-www-multichain-com-qa-user-knotdrop3