BTC 15-minute short-term down 0.44%: Escalation in the Iran–Iraq conflict, combined with Order Book liquidity depletion, triggers selling pressure

From 17:45 to 18:00 (UTC) on July 21, 2026, BTC fell 0.44% within 15 minutes. The price ranged from 66,038.6 to 66,507.8 USDT, with an Ampl of 0.71%. Market volatility intensified as geopolitical risk and liquidity depletion created a short-term synchronized effect.

The main driver behind this anomaly was fluctuations in risk-off sentiment triggered by an escalation in the U.S.-Iran conflict. U.S. Central Command completed another round of strikes on Iran’s missile systems. Iran’s Revolutionary Guard claimed to have destroyed two vessels and warned that shipping security in the Strait of Hormuz was threatened, causing a sharp rise in global energy supply risks. The Strait of Hormuz is a key channel for global oil transport; as the conflict continued to escalate, market concerns about potential supply disruptions grew, prompting some risk-hedging capital to move out of risk assets.

Meanwhile, the crypto industry saw positive catalysts. Hut 8 announced a $9.8 billion AI data center deal, reflecting continued institutional confidence in crypto infrastructure and providing some support to the market. In addition, expectations that the Fed would keep rates unchanged in July offered a short-term macro backdrop for risk assets. Order Book data shows the bid-ask depth ratio is only 0.61, with asks dominating, and the Order Book is extremely thin (just 1 level of effective depth). At $66,299.2, there is a large sell wall of 0.3124 BTC, meaning upside in the near term faces concentrated sell pressure.

Geopolitical risk is still building. If the U.S.-Iran conflict escalates further or the Strait of Hormuz faces a real blockade risk, BTC’s safe-haven narrative as “digital gold” could drive a rapid price rebound. However, investors should remain cautious about short-term volatility risk. Key watch indicators include oil price trends (Brent crude has fallen from $91 to $86.90), changes in the Fed’s September rate-hike expectations, and the flow of large funds on the BTC chain. Technically, BTC is in a profit-retracement zone within the cloud. Breakouts and rejections around the $66,299.2 resistance level should be closely monitored.