Custom-data-provider-shows-30-min-scale-on-chart-after-failure-to-load-60-min-data

Hi Community,

i noticed some weard behviour when selecting the 60 minute scale in the chartview.
maybe i have to implement the dataprovider differently but i would appreciate help in this matter because i have no clue why that error occurs.

to show the problem you may only need these two types.

CODE:

 internal class CustomDataSetProvider : DataSetProviderBase
 {
     private List<DataSet> _dataSet = [];
     public override List<DataSet> DataSets => _dataSet;
     public override string Name => "Custom";
     public override void Initialize()
     {
         _dataSet.Add(
             new DataSet
             {
                 PreferredDataProviderName = "Custom",
                 Name = "Custom",
                 IsDynamicEnabled = false,
                 IsUserCreated = false,
                 ReadOnlySymbols = true,
                 Symbols = ["SYMBOL"],
             });
     }
 }

 internal class CustomDataProvider : DataProviderBase
 {
     public override string Name => "Custom";

     public override bool SupportsScale(HistoryScale scale)
         => true;

     protected override BarHistory GetHistoryInternal(string symbol, HistoryScale scale, DateTime startDate, DateTime endDate, int maxBars)
     {
         Debug.WriteLine($"{symbol} - {scale}.");

         // Return some dummy data.
         var bh = new BarHistory(symbol, scale);
         bh.Add(DateTime.UtcNow, 0, 0, 0, 0, 0);
         return bh;
     }
 }

when traversing thru the scale settings in the ui beside the exception it also runs twice with the 30 minute scale into the gethistorybarinternal.



kind regards
mike