pnl & fee calculations

position size, pnl formulas, and simulated fees.

position size

usd position size:

$$\text{position size} = \text{margin} \times \text{leverage}$$

token quantity:

$$\text{quantity} = \frac{\text{margin} \times \text{leverage}}{\text{entry price}}$$

pnl

long:

$$\text{pnl} = (\text{current price} - \text{entry price}) \times \text{quantity}$$

short:

$$\text{pnl} = (\text{entry price} - \text{current price}) \times \text{quantity}$$

fee

a simulated 0.1% trading fee is deducted per trade.