Entry price and pnl
Perpetuals (Perps) Mechanics
Position Opening/Closing
Opening trade: Absolute position size increases (e.g., increase when long/short positions)
Closing trade: Reduces position exposure
Entry Price Calculation
Opening trades:
New Entry Price = Weighted Average(Current Entry Price, Trade Price)Closing trades: Entry price remains unchanged
PNL Formulas
Unrealized PNL = side × (mark_price - entry_price) × position_size(side = 1 for long, -1 for short)
Closed PNL = fees + [side × (exit_price - entry_price) × position_size]
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