/// <summary>
/// Subscribes IQFeed to the given list of symbols.
/// </summary>
/// <param name="symbols">The symbols to subscribe to.</param>
/// <param name="start">The date to start retrieving data from.</param>
/// <param name="intervalType">The interval type of the bars.</param>
/// <param name="interval">The interval for each bar.</param>
public override async Task Run(
IEnumerable <string> symbols, DateTime start,
DerivativeIntervalType intervalType, int interval)
{
Symbols = new HashSet <string>(symbols);
client.Error += OnError;
client.IntervalBar += OnIntervalBar;
client.SymbolNotFound += OnSymbolNotFound;
client.System += OnSystemMessage;
await Symbols.AsyncForEach(async symbol => await client.ReqBarWatchAsync(
symbol, interval, beginDate: start, intervalType: intervalType));
}
/// <summary>
/// Subscribes IQFeed to the given list of symbols.
/// </summary>
/// <param name="symbols">The symbols to subscribe to.</param>
/// <param name="start">The date to start retrieving data from.</param>
/// <param name="intervalType">The interval type of the bars.</param>
/// <param name="interval">The interval for each bar.</param>
public abstract Task Run(
IEnumerable <string> symbols, DateTime start,
DerivativeIntervalType intervalType, int interval);
