Great you're trying something new
Always :-) An unstoppable source of ideas, I seem to be
Unfortunately we do not collect info about difficulty, total difficulty and blocknumber We did consider it a long time ago, but we discarded this idea, due to increased workload to manage the site. I think most blockexplorers you can call their api's (also with historic info) with difficulty, total difficulty and blocknumber. Try some blockexplorers collectors like Chainz or Blockeperts.
Good idea. So far I have contacted several coin choosers (mining profitability sites).Will look into the big blockexplorer sites, when time. Thanks!
Chainz, blockexperts, who else?
Good luck with your project.
Thanks. Much appreciated.
If anyone else has ideas, or is running many many coin wallets, have a look here:
https://bitcointalk.org/index.php?topic=1181547.msg12451920#msg12451920
Best regards