Block top - The block quantity and size on the blockchain (in blocks) on creation of the current block Nonce - The transaction range for the from address (bear in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://my-social-box.com/story6146547/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain