#region imports
    using System;
    using System.Collections;
    using System.Collections.Generic;
    using System.Linq;
    using System.Globalization;
    using System.Drawing;
    using QuantConnect;
    using QuantConnect.Algorithm.Framework;
    using QuantConnect.Algorithm.Framework.Selection;
    using QuantConnect.Algorithm.Framework.Alphas;
    using QuantConnect.Algorithm.Framework.Portfolio;
    using QuantConnect.Algorithm.Framework.Execution;
    using QuantConnect.Algorithm.Framework.Risk;
    using QuantConnect.Algorithm.Selection;
    using QuantConnect.Parameters;
    using QuantConnect.Benchmarks;
    using QuantConnect.Brokerages;
    using QuantConnect.Util;
    using QuantConnect.Interfaces;
    using QuantConnect.Algorithm;
    using QuantConnect.Indicators;
    using QuantConnect.Data;
    using QuantConnect.Data.Consolidators;
    using QuantConnect.Data.Custom;
    using QuantConnect.DataSource;
    using QuantConnect.Data.Fundamental;
    using QuantConnect.Data.Market;
    using QuantConnect.Data.UniverseSelection;
    using QuantConnect.Notifications;
    using QuantConnect.Orders;
    using QuantConnect.Orders.Fees;
    using QuantConnect.Orders.Fills;
    using QuantConnect.Orders.Slippage;
    using QuantConnect.Scheduling;
    using QuantConnect.Securities;
    using QuantConnect.Securities.Equity;
    using QuantConnect.Securities.Future;
    using QuantConnect.Securities.Option;
    using QuantConnect.Securities.Forex;
    using QuantConnect.Securities.Crypto;   
    using QuantConnect.Securities.Interfaces;
    using QuantConnect.Storage;
    using QCAlgorithmFramework = QuantConnect.Algorithm.QCAlgorithm;
    using QCAlgorithmFrameworkBridge = QuantConnect.Algorithm.QCAlgorithm;
#endregion
namespace QuantConnect.Algorithm.CSharp
{
    public class CreativeFluorescentPinkFlamingo : QCAlgorithm
    {
        public override void Initialize()
        {
            SetStartDate(2018, 1, 1);
            SetEndDate(2022, 1, 1);
            SetCash(100000);

            var ticker = "SPX";
            var toSelect = 10;

            SetName($"v{Globals.Version.Split(".").Last()} - {ticker} - {StartDate:yyyyMMdd} - {EndDate:yyyyMMdd} - {toSelect} selected");
            
            var spx = AddIndex(ticker, Resolution.Minute).Symbol;

            var spxOptions = AddIndexOption(spx, Resolution.Minute);
            spxOptions.SetFilter(u => 
            {
                return u.Contracts(x => x.Take(toSelect));
            });


            // ----

            // Plot active securities            
            var chart = new Chart("Active Securities"); 
            AddChart(chart);
            chart.AddSeries(new Series("Count", SeriesType.Line));

            Schedule.On(DateRules.WeekStart(), TimeRules.Midnight, () => 
            {
                Plot("Active Securities", "Count", ActiveSecurities.Count);
            });

        }
    }
}