Block peak - The block variety and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarklethq.com/story20272438/a-review-of-blockchain-explorer-xrp-https-pad-geolab-space-1eemv59krmalavl2pdd7cg