• Coding Behind Futures Trading
    • 1. Margin & Mark-to-Market
    • 2. Interactive Margin Call Simulator
      • 🏦 Mark-to-Market Engine
        • Account Status

Game · Futures mini-game

Coding Behind Futures Trading

Understand the logic of Margin Accounts and Mark-to-Market.

1. Margin & Mark-to-Market

In Futures trading, you don't pay the full price of the asset. Instead, you put down a deposit called Margin. At the end of every trading day, the exchange checks your account balance to see if your trades made or lost money (Mark-to-Market).

If your account balance drops below the Maintenance Margin requirement, the system automatically triggers a Margin Call, forcing you to deposit more funds or liquidating your position.

// Backend Margin Check Logic
public void endOfDayCheck(TraderAccount account) {
    account.balance += calculateDailyPnL();
    
    if (account.balance < MAINTENANCE_MARGIN) {
        triggerMarginCall(account);
    }
}

2. Interactive Margin Call Simulator

Step through the backend code execution as the market fluctuates day by day. Watch the system check your balance!

🏦 Mark-to-Market Engine

Account Status

Day: 1

Maintenance Margin: $1,000

Balance: $2500

public void endOfDayCheck(TraderAccount account) {
// Daily PnL: $0
account.balance += 0; // Balance is now $2500

if (account.balance < 1000) {
triggerMarginCall(account);
} else {
// All Good. Continue trading.
}
}