Stream indicator

The streaming indicator works with lists of values. For example, let's write an indicator that takes two lists and displays one list with average values:

using System.Collections.Generic;
using TSLab.Script.Handlers;

namespace MyLib
    [Input(0, TemplateTypes.DOUBLE, false, "list1")]
    [Input(1, TemplateTypes.DOUBLE, false, "list2")]
    public class HandlerStream : IStreamHandler
        public IList<double> Execute(IList<double> list1, IList<double> list2)
            var result = new double[list1.Count];
            for (int i = 0; i < list1.Count; i++)
                result[i] = (list1[i] + list2[i]) / 2;
            return result;

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