XT Exchange

Order Cost

العقود الدائمة

Order Cost refers to the total margin required to open a position. Depending on whether you choose a long or short position, different formulas are used to calculate the order cost for limit and market orders.

Long Position

Formula for Calculating Order Cost:
Order Cost = Initial Margin + Buy Fee + Sell Fee

  • Initial Margin = (Order Price × Order Quantity) / Leverage
  • Buy Fee = Order Quantity × Order Price × Taker Fee Rate
  • Sell Fee = Order Quantity × Liquidation Price × Taker Fee Rate
  • Long Position Liquidation Price = Order Price × (Leverage − 1) / Leverage

Example:

Trader A opens a long position of 1 BTC with 10x leverage at a price of 50,000 USDT.

The order cost is calculated as follows:

  • Initial Margin = (50,000 × 1) / 10 = 5,000 USDT
  • Buy Fee = 1 × 50,000 × 0.055% = 27.5 USDT
  • Sell Fee = 1 × 50,000 × (10 − 1) / 10 × 0.055% = 24.75 USDT

Therefore, the Order Cost = 5,000 + 27.5 + 24.75 = 5,052.25 USDT.

To determine the position size based on the order cost, the following formula should be used:

For Trader A:

  • Position Size = Order Cost × Leverage / [Order Price × (0.0011 × Leverage + 0.99945)]

Calculating this:

  • Position Size = 5,052.25 × 10 / [50,000 × (0.0011 × 10 + 0.99945)]
  • Position Size = 1 BTC

Short Position

Formula for Calculating Order Cost:
Order Cost = Initial Margin + Buy Fee + Sell Fee

  • Initial Margin = (Order Price × Order Quantity) / Leverage
  • Buy Fee = Order Quantity × Order Price × Taker Fee Rate
  • Sell Fee = Order Quantity × Liquidation Price × Taker Fee Rate
  • Short Position Liquidation Price = Order Price × (Leverage + 1) / Leverage

Example:

Trader B opens a short position of 1 BTC with 10x leverage at a price of 55,000 USDT.

The order cost is calculated as follows:

  • Initial Margin = (55,000 × 1) / 10 = 5,500 USDT
  • Buy Fee = 1 × 55,000 × 0.055% = 30.25 USDT
  • Sell Fee = 1 × 55,000 × (10 + 1) / 10 × 0.055% = 33.275 USDT

Therefore, the Order Cost = 5,500 + 30.25 + 33.275 = 5,563.525 USDT.

To determine the position size based on the order cost, the following formula should be used:

For Trader B:

  • Position Size = Order Cost × Leverage / [Order Price × (0.0011 × Leverage + 1.00055)]

Calculating this:

  • Position Size = 5,563.525 × 10 / [55,000 × (0.0011 × 10 + 1.00055)]
  • Position Size = 1 BTC
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