AdvanceDeclineRatio.cs

/*
 * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
 * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/
 
using System.Linq;
 
namespace QuantConnect.Indicators
{
    /// <summary>
    /// The advance-decline ratio (ADR) compares the number of stocks 
    /// that closed higher against the number of stocks 
    /// that closed lower than their previous day's closing prices.
    /// </summary>
    public class AdvanceDeclineRatio : AdvanceDeclineIndicator
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="AdvanceDeclineRatio"/> class
        /// </summary>
        public AdvanceDeclineRatio(string name)
            : base(name, (entries) => entries.Count(), (advance, decline) => decline == 0m ? advance : advance / decline) { }
    }
}