chore: import upstream snapshot with attribution
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wehub-resource-sync
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/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Globalization;
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using Newtonsoft.Json;
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using QuantConnect.Data;
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namespace QuantConnect.Algorithm.CSharp
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{
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/// <summary>
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/// Demonstration of using an external custom datasource. LEAN Engine is incredibly flexible and allows you to define your own data source.
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/// This includes any data source which has a TIME and VALUE. These are the *only* requirements. To demonstrate this we're loading in "Bitcoin" data.
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/// </summary>
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/// <meta name="tag" content="using data" />
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/// <meta name="tag" content="custom data" />
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/// <meta name="tag" content="crypto" />
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public class CustomDataBitcoinAlgorithm : QCAlgorithm
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{
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/// <summary>
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/// Initialise the data and resolution required, as well as the cash and start-end dates for your algorithm. All algorithms must initialized.
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/// </summary>
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public override void Initialize()
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{
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//Weather data we have is within these days:
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SetStartDate(2011, 9, 13);
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SetEndDate(DateTime.Now.Date.AddDays(-1));
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//Set the cash for the strategy:
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SetCash(100000);
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//Define the symbol and "type" of our generic data:
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AddData<Bitcoin>("BTC");
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}
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/// <summary>
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/// Event Handler for Bitcoin Data Events: These weather objects are created from our
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/// "Weather" type below and fired into this event handler.
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/// </summary>
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/// <param name="data">One(1) Weather Object, streamed into our algorithm synchronised in time with our other data streams</param>
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public void OnData(Bitcoin data)
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{
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//If we don't have any weather "SHARES" -- invest"
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if (!Portfolio.Invested)
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{
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//Weather used as a tradable asset, like stocks, futures etc.
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if (data.Close != 0)
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{
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// It's only OK to use SetHoldings with crypto when using custom data. When trading with built-in crypto data,
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// use the cashbook. Reference https://github.com/QuantConnect/Lean/blob/master/Algorithm.Python/BasicTemplateCryptoAlgorithm.py
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SetHoldings("BTC", 1);
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}
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Console.WriteLine("Buying BTC 'Shares': BTC: " + data.Close);
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}
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Console.WriteLine("Time: " + Time.ToStringInvariant("T") + " " + Time.ToStringInvariant("T") + data.Close.ToStringInvariant());
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}
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/// <summary>
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/// Custom Data Type: Bitcoin data from Quandl - http://www.quandl.com/help/api-for-bitcoin-data
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/// </summary>
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public class Bitcoin : BaseData
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{
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[JsonProperty("timestamp")]
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public int Timestamp { get; set; }
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[JsonProperty("open")]
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public decimal Open { get; set; }
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[JsonProperty("high")]
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public decimal High { get; set; }
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[JsonProperty("low")]
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public decimal Low { get; set; }
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[JsonProperty("last")]
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public decimal Close { get; set; }
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[JsonProperty("bid")]
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public decimal Bid { get; set; }
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[JsonProperty("ask")]
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public decimal Ask { get; set; }
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[JsonProperty("vwap")]
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public decimal WeightedPrice { get; set; }
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[JsonProperty("volume")]
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public decimal VolumeBTC { get; set; }
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public decimal VolumeUSD { get; set; }
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/// <summary>
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/// The end time of this data. Some data covers spans (trade bars)
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/// and as such we want to know the entire time span covered
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/// </summary>
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/// <remarks>
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/// This property is overriden to allow different values for Time and EndTime
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/// if they are set in the Reader. In the base implementation EndTime equals Time
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/// </remarks>
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public override DateTime EndTime { get; set; }
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/// <summary>
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/// 1. DEFAULT CONSTRUCTOR: Custom data types need a default constructor.
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/// We search for a default constructor so please provide one here. It won't be used for data, just to generate the "Factory".
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/// </summary>
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public Bitcoin()
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{
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Symbol = "BTC";
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}
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/// <summary>
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/// 2. RETURN THE STRING URL SOURCE LOCATION FOR YOUR DATA:
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/// This is a powerful and dynamic select source file method. If you have a large dataset, 10+mb we recommend you break it into smaller files. E.g. One zip per year.
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/// We can accept raw text or ZIP files. We read the file extension to determine if it is a zip file.
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/// </summary>
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/// <param name="config">Configuration object</param>
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/// <param name="date">Date of this source file</param>
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/// <param name="isLiveMode">true if we're in live mode, false for backtesting mode</param>
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/// <returns>String URL of source file.</returns>
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public override SubscriptionDataSource GetSource(SubscriptionDataConfig config, DateTime date, bool isLiveMode)
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{
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if (isLiveMode)
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{
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return new SubscriptionDataSource("https://www.bitstamp.net/api/ticker/", SubscriptionTransportMedium.Rest);
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}
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//return "http://my-ftp-server.com/futures-data-" + date.ToString("Ymd") + ".zip";
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// OR simply return a fixed small data file. Large files will slow down your backtest
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return new SubscriptionDataSource("https://www.quantconnect.com/api/v2/proxy/quandl/api/v3/datasets/BCHARTS/BITSTAMPUSD.csv?order=asc&api_key=WyAazVXnq7ATy_fefTqm", SubscriptionTransportMedium.RemoteFile);
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}
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/// <summary>
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/// 3. READER METHOD: Read 1 line from data source and convert it into Object.
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/// Each line of the CSV File is presented in here. The backend downloads your file, loads it into memory and then line by line
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/// feeds it into your algorithm
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/// </summary>
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/// <param name="line">string line from the data source file submitted above</param>
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/// <param name="config">Subscription data, symbol name, data type</param>
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/// <param name="date">Current date we're requesting. This allows you to break up the data source into daily files.</param>
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/// <param name="isLiveMode">true if we're in live mode, false for backtesting mode</param>
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/// <returns>New Bitcoin Object which extends BaseData.</returns>
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public override BaseData Reader(SubscriptionDataConfig config, string line, DateTime date, bool isLiveMode)
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{
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var coin = new Bitcoin();
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if (isLiveMode)
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{
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//Example Line Format:
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//{"high": "441.00", "last": "421.86", "timestamp": "1411606877", "bid": "421.96", "vwap": "428.58", "volume": "14120.40683975", "low": "418.83", "ask": "421.99"}
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try
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{
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coin = JsonConvert.DeserializeObject<Bitcoin>(line);
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coin.EndTime = DateTime.UtcNow.ConvertFromUtc(config.ExchangeTimeZone);
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coin.Value = coin.Close;
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}
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catch { /* Do nothing, possible error in json decoding */ }
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return coin;
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}
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//Example Line Format:
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//Date Open High Low Close Volume (BTC) Volume (Currency) Weighted Price
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//2011-09-13 5.8 6.0 5.65 5.97 58.37138238, 346.0973893944 5.929230648356
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try
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{
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string[] data = line.Split(',');
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coin.Time = DateTime.Parse(data[0], CultureInfo.InvariantCulture);
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coin.EndTime = coin.Time.AddDays(1);
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coin.Open = Convert.ToDecimal(data[1], CultureInfo.InvariantCulture);
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coin.High = Convert.ToDecimal(data[2], CultureInfo.InvariantCulture);
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coin.Low = Convert.ToDecimal(data[3], CultureInfo.InvariantCulture);
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coin.Close = Convert.ToDecimal(data[4], CultureInfo.InvariantCulture);
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coin.VolumeBTC = Convert.ToDecimal(data[5], CultureInfo.InvariantCulture);
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coin.VolumeUSD = Convert.ToDecimal(data[6], CultureInfo.InvariantCulture);
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coin.WeightedPrice = Convert.ToDecimal(data[7], CultureInfo.InvariantCulture);
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coin.Value = coin.Close;
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}
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catch { /* Do nothing, skip first title row */ }
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return coin;
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}
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}
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}
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}
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