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public abstract interface Bars

 using cAlgo.API;
 using System;
 namespace cAlgo
 {
     // A sample indicator that shows how to use Bars
     [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class BarsSample : Indicator
     {
         private TextBlock _barTicksNumberTextBlock, _barsStateTextBlock;
         [Output("Range", LineColor = "RoyalBlue")]
         public IndicatorDataSeries Range { get; set; }
         [Output("Body", LineColor = "Yellow")]
         public IndicatorDataSeries Body { get; set; }
         protected override void Initialize()
         {
             // Bars events
             Bars.BarOpened += Bars_BarOpened;
             Bars.Tick += Bars_Tick;
             Bars.HistoryLoaded += Bars_HistoryLoaded;
             Bars.Reloaded += Bars_Reloaded;
             var grid = new Grid(2, 2)
             {
                 BackgroundColor = Color.DarkGoldenrod,
                 HorizontalAlignment = HorizontalAlignment.Right,
                 VerticalAlignment = VerticalAlignment.Top,
                 Opacity = 0.5
             };
             grid.AddChild(new TextBlock
             {
                 Text = "Bar Ticks #",
                 Margin = 5
             }, 0, 0);
             _barTicksNumberTextBlock = new TextBlock
             {
                 Text = "0",
                 Margin = 5
             };
             grid.AddChild(_barTicksNumberTextBlock, 0, 1);
             grid.AddChild(new TextBlock
             {
                 Text = "Bars State",
                 Margin = 5
             }, 1, 0);
             _barsStateTextBlock = new TextBlock
             {
                 Margin = 5
             };
             grid.AddChild(_barsStateTextBlock, 1, 1);
             IndicatorArea.AddControl(grid);
         }
         private void Bars_Reloaded(BarsHistoryLoadedEventArgs obj)
         {
             _barsStateTextBlock.Text = "Reloaded";
         }
         private void Bars_HistoryLoaded(BarsHistoryLoadedEventArgs obj)
         {
             _barsStateTextBlock.Text = "History Loaded";
         }
         private void Bars_Tick(BarsTickEventArgs obj)
         {
             _barTicksNumberTextBlock.Text = Bars.TickVolumes.LastValue.ToString();
         }
         private void Bars_BarOpened(BarOpenedEventArgs <span="n">obj)
         {
             _barsStateTextBlock.Text = "New Bar Opened";
         }
         public override void Calculate(int index)
         {
             Range[index<span="p">] = Bars.HighPrices[index<span="p">] - Bars.LowPrices[index<span="p">];
             Body[index<span="p">] = Math.Abs(Bars.ClosePrices[index<span="p">] - Bars.OpenPrices[<span="n">index<span="p">]);
         }
     }
 }

public abstract Bar Last(int index<span="p">)

public abstract int LoadMoreHistory<span="p">()

public abstract void LoadMoreHistoryAsync<span="p">()

public abstract void LoadMoreHistoryAsync<span="p">(Action<BarsHistoryLoadedEventArgs<span="o">> callback<span="p">)

public abstract DataSeries GetPrices<span="p">(PriceType priceType<span="p">)

public abstract Bar Item {get<span="p">;}

public abstract Bar LastBar {<span="k">get<span="p">;}

public abstract int Count {<span="k">get<span="p">;}

public abstract TimeFrame TimeFrame {<span="k">get<span="p">;}

public abstract string SymbolName <span="p">{<span="k">get<span="p">;}

public abstract DataSeries OpenPrices <span="p">{<span="k">get<span="p">;}

public abstract DataSeries <span="n">HighPrices <span="p">{<span="k">get<span="p">;}

public abstract DataSeries <span="n">LowPrices <span="p">{<span="k">get<span="p">;}

public abstract DataSeries <span="n">ClosePrices <span="p">{<span="k">get<span="p">;}

public <span="k">abstract <span="n">DataSeries <span="n">TickVolumes <span="p">{<span="k">get<span="p">;}

public <span="k">abstract <span="n">DataSeries <span="n">MedianPrices <span="p">{<span="k">get<span="p">;}

public <span="k">abstract <span="n">DataSeries <span="n">TypicalPrices <span="p">{<span="k">get<span="p">;}

public abstract <span="n">DataSeries <span="n">WeightedPrices <span="p">{<span="k">get<span="p">;}

public abstract <span="n">TimeSeries <span="n">OpenTimes <span="p">{<span="k">get<span="p">;}

public <span="k">abstract <span="k">event <span="n">Action<span="o"><<span="n">BarsHistoryLoadedEventArgs<span="o">> <span="n">HistoryLoaded<span="p">;

public <span="k">abstract <span="k">event <span="n">Action<span="o"><<span="n">BarsHistoryLoadedEventArgs<span="o">> <span="n">Reloaded<span="p">;

public <span="k">abstract <span="k">event <span="n">Action<span="o"><<span="n">BarsTickEventArgs<span="o">> <span="n">Tick<span="p">;

public <span="k">abstract <span="k">event <span="n">Action<span="o"><<span="n">BarOpenedEventArgs<span="o">> <span="n">BarOpened<span="p">;

public <span="k">abstract <span="k">event <span="n">Action<span="o"><<span="n">BarClosedEventArgs<span="o">> <span="n">BarClosed<span="p">;