Many people trade, only focusing on how much they've earned. But what really makes a difference is—cost. A single trade may seem to earn 8%, 10%, but have you considered: holding the position for several days gradually eats away at your profits due to funding rates; opening and closing positions repeatedly causes small fees to accumulate. In the end, what you actually take home might be far less than you think. The essence of trading is actually cost management. That’s also why I put the main position in