//**************************************************************************************
/// <summary>
/// Retrieves candlesticks from a server.
/// </summary>
public static List <Candlestick> RetrieveCandlesticks(Candlestick.Period iCandlestickPeriod)
{
HttpWebRequest request;
switch (iCandlestickPeriod)
{
case Candlestick.Period.D1:
request = (HttpWebRequest)WebRequest.Create("https://www.alphavantage.co/query?function=FX_DAILY&from_symbol=EUR&to_symbol=USD&apikey=" + kAlphaVantageAPIKey + "&datatype=csv&outputsize=full");
break;
case Candlestick.Period.m1:
request = (HttpWebRequest)WebRequest.Create("https://www.alphavantage.co/query?function=FX_INTRADAY&from_symbol=EUR&to_symbol=USD&interval=1min&apikey=" + kAlphaVantageAPIKey + "&datatype=csv&outputsize=full");
break;
case Candlestick.Period.m5:
request = (HttpWebRequest)WebRequest.Create("https://www.alphavantage.co/query?function=FX_INTRADAY&from_symbol=EUR&to_symbol=USD&interval=5min&apikey=" + kAlphaVantageAPIKey + "&datatype=csv&outputsize=full");
break;
case Candlestick.Period.m15:
request = (HttpWebRequest)WebRequest.Create("https://www.alphavantage.co/query?function=FX_INTRADAY&from_symbol=EUR&to_symbol=USD&interval=15min&apikey=" + kAlphaVantageAPIKey + "&datatype=csv&outputsize=full");
break;
case Candlestick.Period.m30:
request = (HttpWebRequest)WebRequest.Create("https://www.alphavantage.co/query?function=FX_INTRADAY&from_symbol=EUR&to_symbol=USD&interval=30min&apikey=" + kAlphaVantageAPIKey + "&datatype=csv&outputsize=full");
break;
default:
throw new ArgumentException("Unsuported candlestick period", "iCandlestickPeriod");
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
throw new Exception("Could not load candlesticks.");
}
using (Stream stream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
List <Candlestick> results = Candlestick.LoadCSV(reader, iCandlestickPeriod, 0);
results.Reverse();
// Remove not full periods.
if (Utils.UnixToDateTime(results[results.Count - 1].EndTime) > DateTime.UtcNow)
{
results.RemoveAt(results.Count - 1);
}
return(results);
}
}
