Insider's Thought Process Revealed: With 10 million U, at 50x leverage, you can open a position of 500 million U. A 4% increase means a profit of 20 million U. At this point, the position becomes 50000 × 1.04 = 52000 U, and the margin required is only 52000 × 0.02 = 1040 million U, allowing you to withdraw 1960 million U. You can close the position and earn 960 million U.