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Date/Time: Fri, 07 Nov 2025 03:47:42 +0000

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Post From: Sequence of evaluation of interdependent studies during chart load?

[2025-10-08 23:18:51]
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rajeshh - Posts: 50
or a recalc is done, the study starts at Bar 0 and calculates the values for each study, then goes onto the next bar.

So I dont think the above is correct, as I suspected in my original post. I have written a sample study A, and B below. study A calculates a subgraph value when a bar closes, such that for bar X, it reassigns the subgraph value of every bar upto that bar to the index of X. IOW, when bar 1 closes, bar 0 subgraph value will be 1 and so on. So at the end of it, all bars in the chart will have the subgraph value of the last index in the chart.

Study B just gets the value of subgraph from study A for a bar X, and prints it below the low of the bar X. If the calculation is happening as you say where A->B are calculated for every bar on chart loading, then one should see values 1, 2, 3, 4 etc, but B shows the value of the last index in the chart for all the bars. When one does a replay mode of the chart, then the values are correctly showing the current index of the bar.


SCSFExport scsf_A(SCStudyInterfaceRef sc)
{
  SCSubgraphRef Subgraph_a = sc.Subgraph[0];


  if (sc.SetDefaults)
  {
    // Set the configuration and defaults

    sc.GraphName = "Test Sequence of Study Evaluation A";

    sc.CalculationPrecedence = LOW_PREC_LEVEL;

    sc.AutoLoop = true;
    sc.GraphRegion = 0;
    sc.ValueFormat = VALUEFORMAT_INHERITED;

    // Set the name of the first subgraph
    Subgraph_a.Name = "Index of bar";
    Subgraph_a.DrawStyle = DRAWSTYLE_SUBGRAPH_NAME_AND_VALUE_LABELS_ONLY;
    

    sc.ScaleRangeType = SCALE_SAMEASREGION;


    return;

  }
  int n = sc.Index;

  if (sc.GetBarHasClosedStatus() == BHCS_BAR_HAS_CLOSED)


    for (int tbl = n ; tbl >= 0; tbl--)
    {
      Subgraph_a[tbl] = n;


    }

}


SCSFExport scsf_B(SCStudyInterfaceRef sc)
{
  SCSubgraphRef Subgraph_a = sc.Subgraph[0];

  SCInputRef Input_AArrayRef = sc.Input[0];


  if (sc.SetDefaults)
  {
    // Set the configuration and defaults

    sc.GraphName = "Test Sequence of Study Evaluation B";

    sc.CalculationPrecedence = LOW_PREC_LEVEL;

    sc.AutoLoop = true;
    sc.GraphRegion = 0;
    sc.ValueFormat = VALUEFORMAT_INHERITED;

    // Set the name of the first subgraph
    Subgraph_a.Name = "Index of bar";
    Subgraph_a.DrawStyle = DRAWSTYLE_CUSTOM_VALUE_AT_Y;
    Subgraph_a.PrimaryColor = RGB(0, 255, 0);
    Subgraph_a.LineWidth = 10;
    Subgraph_a.DrawZeros = false;

    Input_AArrayRef.Name = "Study A reference";
    Input_AArrayRef.SetStudyID(2);


    sc.ScaleRangeType = SCALE_SAMEASREGION;


    return;

  }
  int n = sc.Index;
  SCFloatArray indexArray;

  if (sc.GetStudyArrayUsingID(Input_AArrayRef.GetStudyID(), 0, indexArray) > 0
    && indexArray.GetArraySize() > 0);

  if (sc.GetBarHasClosedStatus() == BHCS_BAR_HAS_CLOSED)
  {
    //Copy the study data that we retrieved using GetStudyArrayUsingID, into a subgraph data output array
    Subgraph_a.Arrays[0][n] = sc.Low[n] - 2 * sc.TickSize;
    Subgraph_a[n] = (float)indexArray[n];
    
  }

}