According to http://www.cmegroup.com/trading/equity-index/us-index/bitcoin_contract_specifications.html the CME Group will begin trading Bitcoin Futures Contracts at 6 pm.
This stream will begin 30 minutes before and run for about an hour from 11.30 pm London time to 12:30 am London time.
Will we see $20,000 Bitcoin price today? Or $25,000? Who knows.