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#include <windows.h>
#include "sierrachart.h"

SCDLLInit("abt");

SCSFExport scsf_abt(SCStudyInterfaceRef sc)
{
  if (sc.SetDefaults)
  {
    sc.GraphName     = "abt";
    sc.StudyDescription   = "abt @ganz";

    sc.Subgraph[0].Name   = "delta";
    sc.Subgraph[0].SecondaryColorUsed = 1;
    sc.Subgraph[0].PrimaryColor = RGB(0,255,0);
    sc.Subgraph[0].SecondaryColor = RGB(255,0,0);
    sc.Subgraph[0].LineWidth = 8;
    sc.Subgraph[0].DrawStyle = DRAWSTYLE_CUSTOM_TEXT;
    
    sc.GraphRegion       = 1;
    sc.ValueFormat       = 0;
    sc.AutoLoop       = 1;
    sc.FreeDLL       = 1; // set it to 0 for best performance
    
    return;
  }
  
  // this is the formula
  int delta = sc.BaseData[SC_ASKVOL][sc.Index] - sc.BaseData[SC_BIDVOL][sc.Index];
  
  SCString Output;
    
  s_UseTool Tool;
  Tool.Clear();
  Tool.ChartNumber = sc.ChartNumber;
  Tool.Region = sc.GraphRegion;
  Tool.DrawingType = DRAWING_TEXT;
  Tool.ReverseTextColor = 0;
  
  // text position
  
  // horizontal = current Index
  Tool.BeginIndex = sc.Index;
  
  // vertical = HIGH + offset
  Tool.BeginValue = sc.BaseData[SC_HIGH][sc.Index] + 0.0005; //set the offset here
  
  // the condition to choose text color
  if ( delta >= 0 ) Tool.Color = sc.Subgraph[0].PrimaryColor;
  else Tool.Color = sc.Subgraph[0].SecondaryColor;
  
  Tool.FontFace = "Arial";
  Tool.FontSize = sc.Subgraph[0].LineWidth;
  
  // font shape
  Tool.FontBold = true;
  
  Tool.LineNumber = 123456;
  Tool.AddMethod = UTAM_ADD_OR_ADJUST;
  Tool.TextAlignment  = DT_CENTER;
  
  sc.FormatString(Output, "%i", delta);
  Tool.Text = Output;
  sc.UseTool(Tool);      
}