/// <summary>
/// Event invocator for the <see cref="UniverseSelection"/> event
/// </summary>
/// <param name="universe">The universe to perform selection on the data</param>
/// <param name="config">The configuration of the universe</param>
/// <param name="dateTimeUtc">The current date time in UTC</param>
/// <param name="data">The universe selection data to be operated on</param>
protected virtual void OnUniverseSelection(Universe universe, SubscriptionDataConfig config, DateTime dateTimeUtc, IReadOnlyList <BaseData> data)
{
if (UniverseSelection != null)
{
var eventArgs = new UniverseSelectionEventArgs(universe, config, dateTimeUtc, data);
var multicast = (MulticastDelegate)UniverseSelection;
foreach (UniverseSelectionHandler handler in multicast.GetInvocationList())
{
_changes += handler(this, eventArgs);
}
}
}
/// <summary>
/// Applies universe selection the the data feed and algorithm
/// </summary>
/// <param name="args">The arguments from a universe selection event, containing the universe and
/// the data produced for selection</param>
public SecurityChanges ApplyUniverseSelection(UniverseSelectionEventArgs args)
{
var universe = args.Universe;
var settings = universe.SubscriptionSettings;
var limit = 1000; //daily/hourly limit
var resolution = settings.Resolution;
switch (resolution)
{
case Resolution.Tick:
limit = _algorithm.Securities.TickLimit;
break;
case Resolution.Second:
limit = _algorithm.Securities.SecondLimit;
break;
case Resolution.Minute:
limit = _algorithm.Securities.MinuteLimit;
break;
}
// subtract current subscriptions that can't be removed
limit -= _algorithm.Securities.Count(x => x.Value.Resolution == resolution && x.Value.HoldStock);
if (limit < 1)
{
// if we don't have room for more securities then we can't really do anything here.
_algorithm.Error("Unable to add more securities from universe selection due to holding stock.");
return(SecurityChanges.None);
}
// perform initial filtering and limit the result
var selections = universe.SelectSymbols(args.Data).Take(limit).ToHashSet();
// create a hash set of our existing subscriptions by sid
var existingSubscriptions = _dataFeed.Subscriptions.ToHashSet(x => x.Security.Symbol);
var additions = new List <Security>();
var removals = new List <Security>();
// determine which data subscriptions need to be removed for this market
foreach (var subscription in _dataFeed.Subscriptions)
{
// universes can only remove members of their own
if (!universe.ContainsMember(subscription.Security))
{
continue;
}
// never remove universe selection subscriptions
if (subscription.IsUniverseSelectionSubscription)
{
continue;
}
var config = subscription.Configuration;
// never remove internal feeds
if (config.IsInternalFeed)
{
continue;
}
// if we've selected this subscription again, keep it
if (selections.Contains(config.Symbol))
{
continue;
}
// let the algorithm know this security has been removed from the universe
removals.Add(subscription.Security);
// but don't physically remove it from the algorithm if we hold stock or have open orders against it
var openOrders = _algorithm.Transactions.GetOrders(x => x.Status.IsOpen() && x.Symbol == config.Symbol);
if (!subscription.Security.HoldStock && !openOrders.Any())
{
// we need to mark this security as untradeable while it has no data subscription
// it is expected that this function is called while in sync with the algo thread,
// so we can make direct edits to the security here
subscription.Security.Cache.Reset();
if (_dataFeed.RemoveSubscription(subscription))
{
universe.RemoveMember(subscription.Security);
}
}
}
// find new selections and add them to the algorithm
foreach (var symbol in selections)
{
// we already have a subscription for this symbol so don't re-add it
if (existingSubscriptions.Contains(symbol))
{
continue;
}
// create the new security, the algorithm thread will add this at the appropriate time
Security security;
if (!_algorithm.Securities.TryGetValue(symbol, out security))
{
security = SecurityManager.CreateSecurity(_algorithm.Portfolio, _algorithm.SubscriptionManager, _marketHoursDatabase,
symbol,
settings.Resolution,
settings.FillForward,
settings.Leverage,
settings.ExtendedMarketHours,
false,
false);
}
additions.Add(security);
// add the new subscriptions to the data feed
if (_dataFeed.AddSubscription(universe, security, args.DateTimeUtc, _algorithm.EndDate.ConvertToUtc(_algorithm.TimeZone)))
{
universe.AddMember(security);
}
}
// return None if there's no changes, otherwise return what we've modified
return(additions.Count + removals.Count != 0
? new SecurityChanges(additions, removals)
: SecurityChanges.None);
}
/// <summary>
/// Event invocator for the <see cref="UniverseSelection"/> event
/// </summary>
/// <param name="universe">The universe to perform selection on the data</param>
/// <param name="config">The configuration of the universe</param>
/// <param name="dateTimeUtc">The current date time in UTC</param>
/// <param name="data">The universe selection data to be operated on</param>
protected virtual void OnUniverseSelection(Universe universe, SubscriptionDataConfig config, DateTime dateTimeUtc, IReadOnlyList<BaseData> data)
{
if (UniverseSelection != null)
{
var eventArgs = new UniverseSelectionEventArgs(universe, config, dateTimeUtc, data);
var multicast = (MulticastDelegate)UniverseSelection;
foreach (UniverseSelectionHandler handler in multicast.GetInvocationList())
{
_changes += handler(this, eventArgs);
}
}
}
/// <summary>
/// Applies universe selection the the data feed and algorithm
/// </summary>
/// <param name="args">The arguments from a universe selection event, containing the universe and
/// the data produced for selection</param>
public SecurityChanges ApplyUniverseSelection(UniverseSelectionEventArgs args)
{
var universe = args.Universe;
var settings = universe.SubscriptionSettings;
var limit = 1000; //daily/hourly limit
var resolution = settings.Resolution;
switch (resolution)
{
case Resolution.Tick:
limit = _algorithm.Securities.TickLimit;
break;
case Resolution.Second:
limit = _algorithm.Securities.SecondLimit;
break;
case Resolution.Minute:
limit = _algorithm.Securities.MinuteLimit;
break;
}
// subtract current subscriptions that can't be removed
limit -= _algorithm.Securities.Count(x => x.Value.Resolution == resolution && x.Value.HoldStock);
if (limit < 1)
{
// if we don't have room for more securities then we can't really do anything here.
_algorithm.Error("Unable to add more securities from universe selection due to holding stock.");
return SecurityChanges.None;
}
// perform initial filtering and limit the result
var selections = universe.SelectSymbols(args.Data).Take(limit).ToHashSet();
// create a hash set of our existing subscriptions by sid
var existingSubscriptions = _dataFeed.Subscriptions.ToHashSet(x => x.Security.Symbol);
var additions = new List<Security>();
var removals = new List<Security>();
// determine which data subscriptions need to be removed for this market
foreach (var subscription in _dataFeed.Subscriptions)
{
// universes can only remove members of their own
if (!universe.ContainsMember(subscription.Security)) continue;
// never remove universe selection subscriptions
if (subscription.IsUniverseSelectionSubscription) continue;
var config = subscription.Configuration;
// never remove internal feeds
if (config.IsInternalFeed) continue;
// if we've selected this subscription again, keep it
if (selections.Contains(config.Symbol)) continue;
// let the algorithm know this security has been removed from the universe
removals.Add(subscription.Security);
// but don't physically remove it from the algorithm if we hold stock or have open orders against it
var openOrders = _algorithm.Transactions.GetOrders(x => x.Status.IsOpen() && x.Symbol == config.Symbol);
if (!subscription.Security.HoldStock && !openOrders.Any())
{
// we need to mark this security as untradeable while it has no data subscription
// it is expected that this function is called while in sync with the algo thread,
// so we can make direct edits to the security here
subscription.Security.Cache.Reset();
if (_dataFeed.RemoveSubscription(subscription))
{
universe.RemoveMember(subscription.Security);
}
}
}
// find new selections and add them to the algorithm
foreach (var symbol in selections)
{
// we already have a subscription for this symbol so don't re-add it
if (existingSubscriptions.Contains(symbol)) continue;
// create the new security, the algorithm thread will add this at the appropriate time
Security security;
if (!_algorithm.Securities.TryGetValue(symbol, out security))
{
security = SecurityManager.CreateSecurity(_algorithm.Portfolio, _algorithm.SubscriptionManager, _marketHoursDatabase,
symbol,
settings.Resolution,
settings.FillForward,
settings.Leverage,
settings.ExtendedMarketHours,
false,
false);
}
additions.Add(security);
// add the new subscriptions to the data feed
if (_dataFeed.AddSubscription(universe, security, args.DateTimeUtc, _algorithm.EndDate.ConvertToUtc(_algorithm.TimeZone)))
{
universe.AddMember(security);
}
}
// return None if there's no changes, otherwise return what we've modified
return additions.Count + removals.Count != 0
? new SecurityChanges(additions, removals)
: SecurityChanges.None;
}
/// <summary>
/// Applies universe selection the the data feed and algorithm
/// </summary>
/// <param name="args">The arguments from a universe selection event, containing the universe and
/// the data produced for selection</param>
public SecurityChanges ApplyUniverseSelection(UniverseSelectionEventArgs args)
{
var limit = 1000; //daily/hourly limit
var resolution = _algorithm.UniverseSettings.Resolution;
switch (resolution)
{
case Resolution.Tick:
limit = _algorithm.Securities.TickLimit;
break;
case Resolution.Second:
limit = _algorithm.Securities.SecondLimit;
break;
case Resolution.Minute:
limit = _algorithm.Securities.MinuteLimit;
break;
}
// subtract current subscriptions that can't be removed
limit -= _algorithm.Securities.Count(x => x.Value.Resolution == resolution && x.Value.HoldStock);
if (limit < 1)
{
// if we don't have room for more securities then we can't really do anything here.
_algorithm.Error("Unable to add more securities from universe selection due to holding stock.");
return SecurityChanges.None;
}
// perform initial filtering and limit the result
var initialSelections = args.Universe.SelectSymbols(args.Data).Take(limit).ToHashSet();
// create a hash set of our existing subscriptions by sid
var existingSubscriptions = _dataFeed.Subscriptions.ToHashSet(x => x.Security.Symbol);
// create a map of each selection to its 'unique' first symbol/date
var selectedSubscriptions = initialSelections.ToHashSet();
var additions = new List<Security>();
var removals = new List<Security>();
// determine which data subscriptions need to be removed for this market
foreach (var subscription in _dataFeed.Subscriptions)
{
// never remove subscriptions set explicitly by the user
if (subscription.IsUserDefined) continue;
// never remove universe selection subscriptions
if (subscription.IsUniverseSelectionSubscription) continue;
var config = subscription.Configuration;
// never remove internal feeds
if (config.IsInternalFeed) continue;
// don't remove subscriptions for different markets and non-equity types
if (config.Market != args.Configuration.Market || config.SecurityType != SecurityType.Equity) continue;
// if we've selected this subscription again, keep it
if (selectedSubscriptions.Contains(config.Symbol)) continue;
// let the algorithm know this security has been removed from the universe
removals.Add(subscription.Security);
// but don't physically remove it from the algorithm if we hold stock or have open orders against it
var openOrders = _algorithm.Transactions.GetOrders(x => x.Status.IsOpen() && x.Symbol == config.Symbol);
if (!subscription.Security.HoldStock && !openOrders.Any())
{
// we need to mark this security as untradeable while it has no data subscription
// it is expected that this function is called while in sync with the algo thread,
// so we can make direct edits to the security here
subscription.Security.Cache.Reset();
_dataFeed.RemoveSubscription(subscription.Security);
}
}
var settings = _algorithm.UniverseSettings;
// find new selections and add them to the algorithm
foreach (var sid in selectedSubscriptions)
{
// we already have a subscription for this symbol so don't re-add it
if (existingSubscriptions.Contains(sid)) continue;
// create the new security, the algorithm thread will add this at the appropriate time
var security = SecurityManager.CreateSecurity(_algorithm.Portfolio, _algorithm.SubscriptionManager, _hoursProvider,
SecurityType.Equity,
sid,
settings.Resolution,
args.Configuration.Market,
settings.FillForward,
settings.Leverage,
settings.ExtendedMarketHours,
false,
false);
additions.Add(security);;
// add the new subscriptions to the data feed -- TODO : this conversion keeps the behavior the same but stinks like a bug!
_dataFeed.AddSubscription(security, args.DateTimeUtc.ConvertFromUtc(args.Configuration.TimeZone), _algorithm.EndDate, false);
}
// return None if there's no changes, otherwise return what we've modified
return additions.Count + removals.Count != 0
? new SecurityChanges(additions, removals)
: SecurityChanges.None;
}