Support Board

#include "sierrachart.h"

SCDLLName("DeltaInDOMColumnExample")

struct CumulativeDeltaData
{
int cumulativeDelta;
int lastTradeIndex;
};

SCSFExport scsf_DeltaInDOMColumnExample(SCStudyInterfaceRef sc)
{
if (sc.SetDefaults)
{
sc.GraphName = "Delta in DOM Column Example";
sc.MaintainVolumeAtPriceData = 1;
sc.AutoLoop = 1;
return;
}

static CumulativeDeltaData cdData;
if (sc.IsFullRecalculation)
{
cdData.cumulativeDelta = 0;
cdData.lastTradeIndex = 0;
}

// Calculate CD
int newTradesIndex = sc.VolumeAtPriceForBars->GetNumberOfBars() - 1;
for (int barIndex = cdData.lastTradeIndex; barIndex <= newTradesIndex; ++barIndex)
{
if (barIndex < 0 || barIndex >= sc.ArraySize)
continue;

int VAPSizeAtBarIndex = sc.VolumeAtPriceForBars->GetSizeAtBarIndex(barIndex);
for (int VAPIndex = 0; VAPIndex < VAPSizeAtBarIndex; ++VAPIndex)
{
const s_VolumeAtPriceV2* p_VolumeAtPrice = NULL;
if (!sc.VolumeAtPriceForBars->GetVAPElementAtIndex(barIndex, VAPIndex, &p_VolumeAtPrice))
break;

if (p_VolumeAtPrice)
{
cdData.cumulativeDelta += (p_VolumeAtPrice->BidVolume - p_VolumeAtPrice->AskVolume);
}
}
}

cdData.lastTradeIndex = newTradesIndex;

// Debug
SCString debugText;
debugText.Format("Cumulative Delta: %d", cdData.cumulativeDelta);
sc.AddMessageToLog(debugText, 0);

// CD in column
SCString text;
text.Format("%d", cdData.cumulativeDelta);

s_UseTool tool;
tool.Clear();
tool.ChartNumber = sc.ChartNumber;
tool.DrawingType = DRAWING_TEXT;
tool.AddAsUserDrawnDrawing = 1;
tool.UseRelativeVerticalValues = 1;
tool.BeginDateTime = sc.BaseDateTimeIn[sc.ArraySize - 1]; // Use the last bar's datetime
tool.Text = text;
tool.Color = RGB(255, 0, 0); // Red color for visibility
tool.FontSize = 12;
tool.FontBold = true;
tool.Region = 0;
tool.TextAlignment = DT_CENTER | DT_VCENTER; // Center text
tool.AddMethod = UTAM_ADD_OR_ADJUST;

int leftCoordinate = sc.GetDOMColumnLeftCoordinate(n_ACSIL::DOM_COLUMN_GENERAL_PURPOSE_1);
int rightCoordinate = sc.GetDOMColumnRightCoordinate(n_ACSIL::DOM_COLUMN_GENERAL_PURPOSE_1);
int middleCoordinate = (leftCoordinate + rightCoordinate) / 2;

tool.BeginValue = 0;
tool.BeginDateTime = middleCoordinate; // Set the horizontal position

sc.UseTool(tool);
sc.AddMessageToLog("Text drawing tool was used to draw the delta.", 0);
}