Trader: My Rebate Comes from the Liquidation of My Opponent's Position

The protagonist Qin Lang, 32 years old, is a former private equity trader (5 years of experience in stocks + 2 years of futures experience). He was involved in financial management for his boss and ran into a debt of 2 million. He was blacklisted by the industry association, his girlfriend broke up, and he rented a house with a broken computer. The core rules of the system are "Counterparty's loss × rebate multiple N (1~10)". The three red lines prohibit market manipulation/inducing opponents/deliberate loss transfers. The rebates go into the margin pool to unlock cash withdrawals in proportion.