Support Board

// The top of every source code file must include this line
#include "sierrachart.h"

// This line is required. Change the text within the quote
// marks to what you want to name your group of custom studies.
SCDLLName("PrePostBackground")

//This is the basic framework of a study function. Change the name 'TemplateFunction' to what you require.
SCSFExport scsf_PrePostBackground(SCStudyInterfaceRef sc)
{
  // Section 1 - Set the configuration variables and defaults
  if (sc.SetDefaults)
  {
    sc.GraphName = "Pre and Post Market Background";

    sc.AutoLoop = 1; //Automatic looping is enabled.
    sc.DrawStudyUnderneathMainPriceGraph = 1;
    sc.GraphRegion = 0;
    
    sc.Subgraph[0].Name = "BackgroundTop";
    sc.Subgraph[0].DrawStyle = DRAWSTYLE_FILL_TOP;
    sc.Subgraph[0].PrimaryColor = RGB (255, 234, 204);
    sc.Subgraph[1].Name = "BackgroundBottom";
    sc.Subgraph[1].DrawStyle = DRAWSTYLE_FILL_BOTTOM;
    sc.Subgraph[1].PrimaryColor = RGB (211, 234, 253);
    
    sc.Input[0].Name = "Pre-Market Color";
    sc.Input[0].SetColor(255, 234, 204);
    sc.Input[1].Name = "After-Market Color";
    sc.Input[1].SetColor(211, 234, 253);
    
    return;
  }
  
  
  // Section 2 - Do data processing here
  for (int IndexCount {sc.Index}; IndexCount>=sc.IndexOfFirstVisibleBar; IndexCount--) {
    sc.Subgraph[0][IndexCount] = 0;
    sc.Subgraph[1][IndexCount] = 0;

    int IndexInNewYorkTimeInSeconds {
      sc.ConvertDateTimeFromChartTimeZone(sc.BaseDateTimeIn[IndexCount],
      TIMEZONE_NEW_YORK).GetTimeInSeconds()
    };
    
    if (IndexInNewYorkTimeInSeconds>=(4*3600) && IndexInNewYorkTimeInSeconds<(9*3600+30*60)) {
      sc.Subgraph[0][IndexCount] = sc.YPixelCoordinateToGraphValue(0);
      sc.Subgraph[1][IndexCount] = sc.YPixelCoordinateToGraphValue(sc.ChartRegion1BottomCoordinate);
    } // pre-market goes from 4 am to 9:30 am ?
    
    if (IndexInNewYorkTimeInSeconds>=(16*3600) && IndexInNewYorkTimeInSeconds<=(20*3600)) {
      sc.Subgraph[0][IndexCount] = sc.YPixelCoordinateToGraphValue(sc.ChartRegion1BottomCoordinate);
      sc.Subgraph[1][IndexCount] = sc.YPixelCoordinateToGraphValue(0);
    } // post-market goes from 4 pm to 8 pm ?
    
    sc.Subgraph[0].DataColor[IndexCount] = sc.Input[0].GetColor();
    sc.Subgraph[1].DataColor[IndexCount] = sc.Input[1].GetColor();
  }
}