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Date/Time: Fri, 27 Dec 2024 01:03:35 +0000

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Post From: Percentage Scales on Charts based on first visible bar

[2016-03-13 06:51:55]
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Dema - Posts: 42
Hi Team,

I have attempted to code this feature (see below), however, the chart requires a manual recalculate (Ctrl+Ins) upon scrolling/zooming which is not practical.
The global update interval is default 500ms and there is no override on the chart.
Could you please suggest why the auto-loop isn't being triggered automatically? I do have sc.UpdateAlways = 1.

Thankyou.



SCSFExport scsf_PercentageChangeVisible_AutoLoop(SCStudyInterfaceRef sc)
{
  
  if (sc.SetDefaults)
  {
    sc.GraphName = "Percentage Line AUTO Loop DZ";
    sc.StudyDescription = "Percentage Line AUTO Loop calculates percentage change from first visible bar";

    sc.AutoLoop = 1;
    sc.FreeDLL = 1;
    sc.UpdateAlways = 1;
    
    sc.Subgraph[0].Name = "LAST Line";
    sc.Subgraph[0].DrawStyle = DRAWSTYLE_LINE;
    sc.Subgraph[0].LineStyle = LINESTYLE_DOT;
    sc.Subgraph[0].DrawZeros = 1;

    return;
  }


  if(sc.Index == 0 || sc.Index <= sc.IndexOfFirstVisibleBar)
  {
    sc.Subgraph[0][sc.Index] = 0.0f;
  } else {
    sc.Subgraph[0][sc.Index] = 100.0f * (sc.BaseData[SC_LAST][sc.Index] - sc.BaseData[SC_LAST][sc.IndexOfFirstVisibleBar]) / sc.BaseData[SC_LAST][sc.IndexOfFirstVisibleBar];
  }

}