I've noticed that most sportsbook's conversion rates from BTC to USD is very similar to Blockchain's Bitcoin ticker now.
Also, there's an app for your phone called "Bitcoin Calculator" by Daniel Routman in the Playstore. He uses a LIVE FEED for BTC and it is very accurate. It is also very similar to the Blockchain Bitcoin Ticker in regards to current price.
Websites like Coindesk etc... are way off.
Just letting SBR know... they could probably find a better more efficient accurate feed... elsewhere.