/*[[
	Name := Periods_Back_High_Low
	Author := Copyright © 2004, David W Honeywell
	Link := DavidHon@msn.com
	Separate Window := No
	First Color := Cyan
	First Draw Type := Line
	First Symbol := 217
	Use Second Data := Yes
	Second Color := Coral
	Second Draw Type := Line
	Second Symbol := 218
]]*/
Inputs   : Periods_Begin(18);
Variable : shift(0),Periods_High(0),Periods_Low(0);
Variable : prevbars(0),is_First(True),CheckSum(0),CheckSumPrev(0);

If Bars<prevbars or Bars-prevbars>1 Then is_First=True;
prevbars=Bars;

//Have any Inputs changed?
CheckSum=Periods_Begin;   
 
If CheckSum!=CheckSumPrev Then is_First=True;
CheckSumPrev=CheckSum;
//--------------------------------------------------------------------

If is_First Then
{ /*
This block executes ONLY First Time for each Attachment-To-Chart.
If MT is closed or another Profile is selected, the values & parameters
for this module are saved, and when MT or this Profile is restarted,
it would not be the First Time Attachment-To-Chart. So this block
would not
execute unless the value of "Bars" has changed.
*/
SetLoopCount(0);

Periods_High= High[Highest(MODE_HIGH,shift+Periods_Begin,Periods_Begin)];
Periods_Low = Low[Lowest(MODE_LOW,shift+Periods_Begin,Periods_Begin)];

For shift=Periods_Begin Downto 0 Begin

    SetIndexValue(shift,Periods_High);
	SetIndexValue2(shift,Periods_Low);
End;
};