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Date/Time: Fri, 18 Apr 2025 04:25:13 +0000

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Post From: My custom studies do not update correctly in real time

[2025-03-28 23:29:04]
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User904259 - Posts: 2
My custom studies look messy and noisy when the chart updates in real time as new candles are added to the chart (studies in chart region 2 & chart region 3). However, when I open the Studies\Chart Studies dialog box and just Click ‘Apply’, the study gets re-evaluated . . . The study then looks noticeably different. It is far less messy, less chaotic and less noisy. The values of the study have been changed by the re-evaluation of the 'Apply" button.

[]Why do these studies not update correctly in real time?

I am using manual looping with ‘sc.UpdateStartIndex’.
I have included the block of code for study “Step(Close-StepPrice) RNK”.

I have created other custom studies that have the same problem.
How do I fix my custom studies to update correctly in real time? What am I doing wrong?

SCSFExport scsf_StepCloseMinusStepPrice(SCStudyInterfaceRef sc)
{
  float PRICE = 0;
  float POINT = 0.0f;
  float STEPSIZEA = 0.0f;
  float sMinA = 0.0f;
  float sMaxA = 0.0f;
  float& sMin1A = sc.GetPersistentFloatFast(0);// *** EACH 'int' AND 'float' PERSISTENT VARIABLE ***
  float& sMax1A = sc.GetPersistentFloatFast(1);// *** NEEDS ITS OWN INDEX NUMBER.         ***
  int& TRENDA = sc.GetPersistentIntFast(0);  // *** THESE ARE -NOT- INITIAL VALUES.       ***

  float POINTB = 0.5f;
  float STEPSIZEB = 0.0f;
  float sMinB = 0.0f;
  float sMaxB = 0.0f;
  float& sMin1B = sc.GetPersistentFloatFast(2);// *** EACH 'int' AND 'float' PERSISTENT VARIABLE ***
  float& sMax1B = sc.GetPersistentFloatFast(3);// *** NEEDS ITS OWN INDEX NUMBER.         ***
  int& TRENDB = sc.GetPersistentIntFast(1);  // *** THESE ARE -NOT- INITIAL VALUES.       ***

  SCSubgraphRef Subgraph_StepClsMnsStpPrc = sc.Subgraph[0];
  SCSubgraphRef Subgraph_ZeroLine = sc.Subgraph[1];

  SCFloatArray SteppedPrice;
  SCFloatArray CloseMinusStepPrice;
  
  SCInputRef Input_StepSizeA = sc.Input[0];
  SCInputRef Input_StepSizeB = sc.Input[1];

  // Section 1 - Set the configuration variables and defaults
  if (sc.SetDefaults)
  {
    sc.GraphName = "Step(Close-StepPrice) RNK";

    sc.AutoLoop = 0; //Automatic looping off
    sc.UpdateAlways = 1;

    sc.GraphRegion = 1;

    Subgraph_StepClsMnsStpPrc.Name = "Step(Close-StepPrice) RNK";
    Subgraph_StepClsMnsStpPrc.DrawStyle = DRAWSTYLE_LINE;
    Subgraph_StepClsMnsStpPrc.PrimaryColor = RGB(0, 255, 100);
    Subgraph_StepClsMnsStpPrc.DrawZeros = true;

    Subgraph_ZeroLine.Name = "Zero Line";
    Subgraph_ZeroLine.DrawStyle = DRAWSTYLE_LINE;
    Subgraph_ZeroLine.LineWidth = 1;
    Subgraph_ZeroLine.PrimaryColor = RGB(255, 255, 255);
    Subgraph_ZeroLine.DrawZeros = true;

    Input_StepSizeA.Name = "StepSizeA";
    Input_StepSizeA.SetFloat(100.0f);

    Input_StepSizeB.Name = "StepSizeB";
    Input_StepSizeB.SetFloat(10.0f);

    return;
  }


  // Section 2 - Do data processing here
  //SCString Message; //Message.Clear();
  //Message.Format("## Message HERE"); EXAMPLE Message.AppendFormat("Price %f, ", Price);
  //sc.AddMessageToLog(Message, 0); // a non-popped up message that goes to 'Sierra Chart/Window/Message Log'

  STEPSIZEA = Input_StepSizeA.GetFloat();
  STEPSIZEB = Input_StepSizeB.GetFloat();
  POINT = sc.TickSize;

  for (int Index = sc.UpdateStartIndex; Index < sc.ArraySize; Index++)
  {
    PRICE = (sc.BaseData[SC_RENKO_OPEN][Index] + sc.BaseData[SC_RENKO_CLOSE][Index]) / 2;

    sMaxA = PRICE + 2 * STEPSIZEA * POINT;
    sMinA = PRICE - 2 * STEPSIZEA * POINT;

    if (PRICE > sMax1A) TRENDA = 1;
    if (PRICE < sMin1A) TRENDA = -1;

    if (TRENDA > 0 && sMinA < sMin1A) sMinA = sMin1A;
    if (TRENDA < 0 && sMaxA > sMax1A) sMaxA = sMax1A;

    if (TRENDA > 0) SteppedPrice[Index] = sMinA + STEPSIZEA * POINT;
    if (TRENDA < 0) SteppedPrice[Index] = sMaxA - STEPSIZEA * POINT;

    sMin1A = sMinA;
    sMax1A = sMaxA;

    CloseMinusStepPrice[Index] = (sc.BaseData[SC_RENKO_CLOSE][Index] - SteppedPrice[Index]);
    // -----------------------------------------------------------------------------------------
    sMaxB = CloseMinusStepPrice[Index] + 2 * STEPSIZEB * POINTB;
    sMinB = CloseMinusStepPrice[Index] - 2 * STEPSIZEB * POINTB;

    if (CloseMinusStepPrice[Index] > sMax1B) TRENDB = 1;
    if (CloseMinusStepPrice[Index] < sMin1B) TRENDB = -1;

    if (TRENDB > 0 && sMinB < sMin1B) sMinB = sMin1B;
    if (TRENDB < 0 && sMaxB > sMax1B) sMaxB = sMax1B;

    if (TRENDB > 0) Subgraph_StepClsMnsStpPrc[Index] = sMinB + STEPSIZEB * POINTB;
    if (TRENDB < 0) Subgraph_StepClsMnsStpPrc[Index] = sMaxB - STEPSIZEB * POINTB;

    sMin1B = sMinB;
    sMax1B = sMaxB;



    Subgraph_ZeroLine[Index] = 0.0f;
  }

}