#include "sierrachart.h"


// Name of the custom study.
SCDLLName("Delta Difference") 


SCSFExport scsf_DeltaDifference(SCStudyGraphRef sc)
{
	// Section 1 - Set the configuration variables
	
	
	SCInputRef InputData = sc.Input[0];
	

	if (sc.SetDefaults)
	{
		// Set the configuration and defaults
		
		sc.GraphName = "Delta Difference";
		
		sc.StudyDescription = "Delta Difference";
		
		sc.FreeDLL = 1;   // During development set this flag to 1, so the DLL can be rebuilt without restarting Sierra Chart. When development is completed, set it to 0 to improve performance.

		sc.AutoLoop = 1;  // true
		
		
		//Output Graph
		
		sc.Subgraph[0].Name = "Delta Volume";
		sc.Subgraph[0].DrawStyle = DRAWSTYLE_BAR;
		sc.Subgraph[0].PrimaryColor = RGB(0,255,0);
		sc.Subgraph[0].SecondaryColor = RGB(255,0,0);
		sc.Subgraph[0].SecondaryColorUsed = 1;
		
		//User Inputs
		
		InputData.Name = "Input Data";
		InputData.SetCustomInputIndex(0);
		InputData.SetCustomInputStrings("Up/Down Volume;Ask/Bid Volume;Up/Down Trades");
		
		
		return;
	}
	
	
	// Section 2 - Do data processing here
	//Select Input Data Type
	unsigned int Up;
	unsigned int Down;

	if(InputData.GetIndex() == 0)
	{	
		Up = SC_UPVOL;
		Down = SC_DOWNVOL;
	}
	else if(InputData.GetIndex() == 1)
	{	
		Up = SC_ASKVOL;
		Down = SC_BIDVOL;
	}
	else
	{
		Up = SC_ASKNT;
		Down = SC_BIDNT;
	}
	
	if (sc.BaseDataIn[Up][sc.Index] > sc.BaseDataIn[Down][sc.Index])
	{
	sc.Subgraph[0][sc.Index] = (sc.BaseDataIn[Up][sc.Index] - sc.BaseDataIn[Down][sc.Index]);
	sc.Subgraph[0].DataColor[sc.Index] = sc.Subgraph[0].PrimaryColor;
	}
	else 
	{
	sc.Subgraph[0][sc.Index] = (sc.BaseDataIn[Up][sc.Index] - sc.BaseDataIn[Down][sc.Index]);
	sc.Subgraph[0].DataColor[sc.Index] = sc.Subgraph[0].SecondaryColor;
	}
	
	
	
}