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docs/ccxt/wiki/examples/js/huobi-open-close-contract.md

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+- [Huobi Open Close Contract](./examples/js/)
+
+
+ ```javascript
+ import ccxt from '../../js/ccxt.js';
+
+const exchange = new ccxt.huobi ({
+    'apiKey': 'YOUR_API_KEY',
+    'secret': 'YOUR_SECRET',
+    'options': {
+        'defaultType': 'swap',
+        'marginMode': 'cross'
+    },
+})
+
+;(async () => {
+    const markets = await exchange.loadMarkets ()
+
+    // exchange.verbose = true // uncomment for debugging purposes if necessary
+
+    // Example: creating and closing a contract
+    let symbol = 'ADA/USDT:USDT' // market positions for contracts not available
+    let type = 'limit'
+    let side = 'buy'
+    let offset= 'open'
+    let leverage = 1
+    let amount = 1
+    let price = 1
+    let clientOrderId = 6;
+    let params = {
+        'offset': offset,
+        'lever_rate': leverage,
+        'client_order_id': clientOrderId
+    }
+
+    try {
+        // fetching current balance
+        const balance = await exchange.fetchBalance()
+        console.log(balance)
+
+        // placing an order
+        const order = await exchange.createOrder (symbol, type, side, amount, price, params)
+        console.log (order)
+
+        // fetching position
+        const position = await exchange.fetchPosition(symbol)
+        console.log(position)
+
+
+        // closing it by issuing an oposite contract 
+        // warning: since we can only place limit orders
+        // it might take a while (depending on the price we choose and market fluctuations) 
+        // to the order be fulfilled
+        // and therefore close our previous position
+        side = 'sell'
+        type = 'limit'
+        offset = 'close'
+        reduce_only = 1 // 1 : yes, 0: no
+        clientOrderId = 9
+        price = 1.147 // adjust this accordingly
+        params = {'offset': offset, 'reduce_only': reduce_only, 'client_order_id': clientOrderId}
+        const opositeOrder = await exchange.createOrder (symbol, type, side, amount, price, params)
+        console.log (opositeOrder)
+    } catch (e) {
+        console.log (e.constructor.name, e.message)
+    }
+}) ()
+ 
+```