Creating Custom Data Sources

This article needs to be rewritten for the v2 engine. In the meantime, check the out the demo code below and the previous article for the v1 engine.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TuringTrader.SimulatorV2;
using TuringTrader.SimulatorV2.Indicators;
using TuringTrader.SimulatorV2.Assets;

namespace Demos
{
    public class Demo08_CustomData : Algorithm
    {
        // we overload the asset method, so that our custom data
        // source is localized in a short blob of code
        public override TimeSeriesAsset Asset(string name)
        {
            switch(name)
            {
                case "ernie":
                case "bert":
                    return Asset(name, () =>
                    {
                        // the retrieval function returns a list of bars
                        // note that this function is parameterless
                        var bars = new List<BarType<OHLCV>>();
                        foreach (var timestamp in TradingCalendar.TradingDays)
                        {
                            var p = name == "ernie" ? 360.0 : 180.0;
                            var t = (timestamp - DateTime.Parse("1970-01-01")).TotalDays;
                            var v = Math.Sin(2.0 * Math.PI * t / p);

                            bars.Add(new BarType<OHLCV>(
                                timestamp,
                                new OHLCV(v, v, v, v, 0.0)));
                        }

                        return bars;
                    });

                // optionally, we can keep the built-in data sources alive
                default:
                    return base.Asset(name);
            }
        }

        public override void Run()
        {
            StartDate = DateTime.Parse("2022-01-01T16:00-05:00");
            EndDate = DateTime.Parse("2022-12-31T16:00-05:00");

            SimLoop(() =>
            {
                Plotter.SelectChart("custom data", "date");
                Plotter.SetX(SimDate);

                // custom data behave just like built-in data
                // they have OHLCV bars, and they are cached
                Plotter.Plot("custom data #1", Asset("ernie").Close[0]);
                Plotter.Plot("custom data #2", Asset("bert").Close[0]);
                Plotter.Plot("regular data", Asset("SPY").Close[0] / 350.0 - 1.0);
            });
        }

        // minimalistic report
        public override void Report() => Plotter.OpenWith("SimpleChart");
    }
}