If the price decreases from 30,000 USDT to 26,000 USDT:
- Unrealized P&L: 0.1 BTC * (26,000 – 30,000) USDT = -400 USDT
- Remaining Margin: Initial Margin + Unrealized P&L = 300 USDT – 400 USDT = -100 USDT
Since the remaining margin is below the maintenance margin, the position is immediately liquidated. In this case, the trader loses the entire position and remaining margin.