// Simplified Order Matching Logic (Node.js)

const matchOrders = async () => {
const buyOrders = await Orders.find({ type: 'buy' }).sort({ price: -1 });
const sellOrders = await Orders.find({ type: 'sell' }).sort({ price: 1 });

for (let buy of buyOrders) {
for (let sell of sellOrders) {
if (buy.price >= sell.price && buy.amount > 0 && sell.amount > 0) {
const tradeAmount = Math.min(buy.amount, sell.amount);

// Update buyer and seller balances (simplified)
await executeTrade(buy.userId, sell.userId, tradeAmount, sell.price);

// Adjust order amounts
buy.amount -= tradeAmount;
sell.amount -= tradeAmount;

await buy.save();
await sell.save();

console.log(`Executed trade for ${tradeAmount} BTC at ${sell.price} USD`);
}
}
}
};

This is just a basic logic snippet of a real-time order matching engine — the heart of any crypto exchange.

A full exchange platform developed by Fourchain includes:

✅ Advanced matching engine
✅ User wallets & KYC modules
✅ Admin dashboard
✅ Liquidity integration
✅ Trading charts (Candlestick, Order Book, Depth Chart)
✅ Fiat & crypto payment gateway
✅ DEX/OTC/spot/futures support (optional modules)
✅ 24/7 support & free consultation

💰 Cost: Starting from $8450 with free deployment
🚀 Delivery Time: 15–20 working days
🔐 Security: Full encryption, 2FA, DDOS protection

📩 Want the full source code with complete modules at a low cost?
Reach out to Fourchain to get a demo, consultation, and full feature list.

Let me know if you'd like this tailored for a specific tech stack (Laravel, React, Python, etc.) or use case (spot trading, DEX, NFT exchange).