Bitcoin price formed a support above USD 35,000 and USD 35,500.
As a result, BTC climbed higher above the USD 36,500 resistance, but it failed to gain strength above USD 37,200 and USD 37,500.
It is currently (05:00 UTC) retreating lower, but the USD 35,500 zone could provide support.
Also, there were strong bullish moves in most major altcoins in the past two days.