A built-in market simulator drives one live account state: prices tick every seconds, candles and order books move, and orders really fill. Place a market, limit or stop-limit order and your wallet, portfolio, P&L and trade history all update at once. Deposits confirm step by step. Withdrawals go through review with 2FA. Futures positions show live P&L and liquidation prices. Balances use exact 12-decimal arithmetic, so nothing drifts.