Also, if it helps you out some, I know your site looks for sentiment readings, which are hard to come by in the crypto space. But Bitfinex.com has funding options that go up and down with interest in people wanting to offer their coins for funding, or wanting to use coins for shorting (except for BTC which can be used for betting against other coins). I figure you could create some kind of sentiment reading from the funding rates. I hope that helps!