Evening Market Analysis on May 21:

Bitcoin rose to around 108,000 at noon before falling back to around 106,100. Ethereum rose to around 2,615 at noon before retreating to around 2,515, oscillating.

From the current four-hour structure, Bitcoin bulls are reducing their positions, with support around 105,200. In the one-hour structure, Bitcoin's upward momentum is increasing. Short-term focus is on resistance around 106,800.

Personal suggestion: Bitcoin's rebound around 106,500-106,800 is a sell opportunity, targeting around 105,200-104,800. Ethereum's rebound around 2,535-2,555 is a sell opportunity, targeting around 2,485-2,465.