In MT4/MT5, balance and equity are two key account values that reflect different aspects of your funds:
Balance: This is the total amount of money in your account excluding open positions. It reflects deposits, withdrawals, and realised profits or losses from closed trades.
Equity: This is your account value including open positions. It equals your balance plus or minus the unrealised profit or loss from positions currently open.
Understanding the difference helps you manage margin, monitor risk, and avoid margin calls or stop-outs while trading.