Lean  $LEAN_TAG$
UnmatchedPositionCountOptionStrategyMatchObjectiveFunction.cs
1 /*
2  * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
3  * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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9  * Unless required by applicable law or agreed to in writing, software
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12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14 */
15 
16 using System.Linq;
17 
19 {
20  /// <summary>
21  /// Provides an implementation of <see cref="IOptionStrategyMatchObjectiveFunction"/> that evaluates the number of unmatched
22  /// positions, in number of contracts, giving precedence to solutions that have fewer unmatched contracts.
23  /// </summary>
25  {
26  /// <summary>
27  /// Computes the delta in matched vs unmatched positions, which gives precedence to solutions that match more contracts.
28  /// </summary>
30  {
31  var value = 0m;
32  foreach (var strategy in match.Strategies)
33  {
34  foreach (var leg in strategy.OptionLegs.Concat<OptionStrategy.LegData>(strategy.UnderlyingLegs))
35  {
36  value += leg.Quantity;
37  }
38  }
39 
40  return value - unmatched.Count;
41  }
42  }
43 }