Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your 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://social-medialink.com/story5369659/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-md-kif-rocks-qxb6ylbntwcjnvrpqnzeqw