Block top - The block selection and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount with the from address (Keep in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://active-bookmarks.com/story20197932/the-greatest-guide-to-blockchain-explorer-unconfirmed-transaction-https-md-swk-web-com-onnbpblstmy8giqdrhnkga