Fee rate:
Take Binance as an example (the difference in handling fees between platforms is not big)
Spot handling fee: 0.1% (one thousandth)
Contract handling fee: 0.05% (0.05%)
Spot Fee Calculation Formula:
Open position (buy): number of coins ✖ price of coins ✖ 0.1%
Closing position (sell): number of coins ✖ price of coins ✖ 0.1%
Contract fee calculation formula:
Opening a position (buy):
Opening quantity ✖ coin price ✖ leverage ratio ✖ 0.05%
Closing position (sell):
Closing amount ✖ coin price ✖ leverage ✖ 0.05%
For example, if the principal is 2000u and the bet is opened 20 times, the order will be 40,000u.
Buy 20u, sell 20u, total 40u
If there are 3 orders per day, the daily handling fee is 120u
The handling fee is 43800u a year, and this is only 2000u of principal, and it is only opened 20 times. If you open 40 times each time, the handling fee will double, and it will be 87600u a year.
Therefore, you must issue a handling fee refund. Whatever you can get back is free.
After opening, if you return 20, as long as you keep your principal, you can get 8760u back in handling fees. If you earn 2000, then 2000+8760 equals 10760. If your position is liquidated accidentally, the returned handling fees can still bring you a certain amount of principal.
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