Bitcoin price rallied towards the USD 18,500 level, where sellers took a strong stand. As a result, there was a sharp bearish reaction and BTC declined below USD 18,000. The price even broke the USD 17,650 support, but the bulls protected BTC from more losses, and currently (13:00 UTC) it is trading above USD 18,000 again.
Most major altcoins also declined heavily and are struggling to recover,