Block peak - The block variety and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://minibookmarks.com/story20280397/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-www-instapaper-com-p-16864836