2026-03-19 07:00 to 07:15 (UTC) during this period, BTC price fluctuated in the range of 69989.7 to 70593.9 USDT in the short term, ultimately recording a yield of -0.84% within 15 minutes, with an amplitude of 0.86%. Market attention during this period rose rapidly, volatility increased, reflecting a contraction in risk appetite among short-term traders. The main driving force of this fluctuation was the collective increase in selling pressure from spot and derivatives markets. Standard market logic shows that if spot trading volume expands within this window and large sell orders emerge, it tends to push prices downward. Meanwhile, derivatives