$BTC July 21 Midday Analysis by the Boss

After a late-night surge that continued the rally, this morning kept moving upward and set a new high at 657; by midday, the market fell into tight sideways consolidation and tug-of-war.
The 660 level is a real, strong resistance zone. Bulls have repeatedly probed but had no strength to break through. The signals on the chart are already very clear: if it can’t break above 660, a pullback adjustment is inevitable.
First pullback target: 646—this is the first support line for the short term; a break below will accelerate the downside.
Second pullback target: 638—this is the core support range for the day, and also a key spot for setting up long entries at lower levels afterward.