Block top - The block range and size on the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the 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://mediajx.com/story25062492/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-http-www-stes-tyc-edu-tw-xoops-modules-profile-userinfo-php-uid-3693980