Shorting with the Alpaca API in C#

ShortProgram.cs

using Alpaca.Markets;
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

// With the Alpaca API, you can open a short position by submitting a sell
// order for a security that you have no open long position with.

namespace ShortingExample
{
    internal class ShortProgram
    {
        private static string API_KEY = "your_api_key";

        private static string API_SECRET = "your_secret_key";

        private static string API_URL = "https://paper-api.alpaca.markets";

        // The security we'll be shorting
        private static string symbol = "TSLA";

        private static RestClient restClient;
        public static async Task Main(string[] args)
        {
            // First, open the API connection
            restClient = new RestClient(API_KEY, API_SECRET, API_URL, apiVersion: 2);

            // Submit a market order to open a short position of one share
            var order = await restClient.PostOrderAsync(symbol, 1, OrderSide.Sell, OrderType.Market, TimeInForce.Day);
            Console.WriteLine("Market order submitted.");

            // Submit a limit order to attempt to grow our short position
            // First, get an up-to-date price for our security
            var barSet = await restClient.GetBarSetAsync(new[] { symbol }, TimeFrame.Minute, 1);
            var bars = barSet[symbol].ToList();
            var price = bars[0].Close;

            // Submit another order for one share at that price
            order = await restClient.PostOrderAsync(symbol, 1, OrderSide.Sell, OrderType.Limit, TimeInForce.Day, price);
            Console.WriteLine($"Limit order submitted. Limit price = {order.LimitPrice}");

            // Wait a few seconds for our orders to fill...
            Thread.Sleep(2000);

            // Check on our position
            var position = await restClient.GetPositionAsync(symbol);
            if (position.Quantity < 0)
            {
                Console.WriteLine($"Short position open for {symbol}");
            }
        }
    }
}