Balance: Deposits - Withdrawals + Realized P&L
P&L: Unrealized P&L. Current profit and loss from all open positions.
Used Margin: The sum of the margin required to maintain the order and position margin.
Free Margin: your margin available for new positions.
Free Margin = Balance + Unrealized P&L - Used Margin
Equity: Balance + Unrealized P&L
Margin Level: The proportion of funds used.
Margin Level = Margin / Equity