After the recent Chinese slap in the face that they might ban bitcoin (unlikely), the price rejected the 61.8 fibonacci resistance and moved lower to test support at USD 4000.
Levels to watch for a bullish scenario: 4400 and 4600 for clues we are on track upwards again.
Level to watch for a bearish scenario: 4000, where a break lower could take us towards 3600 or 3000.