BTC 15-minute sharp decline of 0.71%: Large on-chain funds flowing into exchanges trigger concentrated selling

On April 21, 2026, from 12:30 to 12:45 (UTC), BTC price experienced a -0.71% return fluctuation, with the price dropping from 76,525.0 USDT to 75,711.3 USDT, an amplitude of 1.07%. During this period, spot trading volume increased by 18% compared to the previous period, sell orders accounted for a higher proportion, the order book depth showed short-term asymmetry, and market volatility intensified.

The main driver of this fluctuation was the selling pressure caused by large on-chain fund inflows into exchanges. Data shows that during this period, exchange net inflow of BTC increased from +2,100 coins to +2,580 coins, a 23% increase; large transfers (single transfer >500 BTC) rose from 4 to 7 transactions. Some whale accounts transferred BTC into exchange hot wallets and quickly sold, forming short-term concentrated selling pressure. Order book data indicates that the proportion of active sell orders rose to 58%, buy order cancellations accelerated, and buying capacity weakened.

Additionally, passive stop-losses from leveraged positions and active position reductions amplified the downward movement. The long position ratio in the futures market decreased from 54% to 50%, liquidations increased from 80 to 110 coins, and the funding rate briefly declined, reflecting a short-term cooling of market risk appetite. Meanwhile, spot and derivatives trading volumes expanded simultaneously, with spot sell orders and futures long position stop-losses resonating. Furthermore, Blockchain.com launched a self-custodied perpetual contract feature at 12:00, prompting some users to adjust or arbitrage positions in the short term, objectively increasing liquidity disturbances.

In the short term, attention should be paid to changes in net inflows into exchanges. If funds continue to flow in and are not effectively absorbed, further declines may be triggered. The risk of a secondary dip after the leverage ratio in the futures market falls remains, so it is recommended to monitor key support levels and on-chain fund flows, manage positions reasonably, and guard against sudden liquidity shocks.