Day High Low Indicator Data Extraction for EA

[Russfox]

I have found a indicator on this website which provides previous day (or week / /month) high and low prices.  I want to use this as the basis of creating my own EA to place buystops and sellstops at the previous day high and low.  

Link: https://www.mql5.com/en/code/14410

I can see the code I want to extract and connect to in my enter trade section (full code provided in the link):

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
enum AvailablePeriods
  {
   PreviousDay=PERIOD_D1,// Previous day
   PreviousWeek=PERIOD_W1,// Previous week
   PreviousMonth=PERIOD_MN1 // Previous month
  };
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
struct TimeRange
  {
   bool Failed;
   datetime StartTime;
   datetime EndTime;

   TimeRange()
     {
      Failed=false;
      StartTime=0;
      EndTime=0;
     }
  };
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
struct PeriodData
  {
   TimeRange PeriodRange;

   double PeriodHigh;
   double PeriodClose;
   double PeriodLow;

   PeriodData()
     {
      PeriodHigh=0;
      PeriodClose=0;
      PeriodLow=0;
     }
  };

input string _sepTimeShift=""; // /////// Calculation
input ENUM_TIMEFRAMES Precision=PERIOD_H1; // Precision
input AvailablePeriods TargetTimeFrame=PreviousDay; // Period
input int PeriodsToCalculate=1; // Periods to calculate
input int HoursShift=-2; // Hours shift
input int MinutesShift=0; // Minutes shift
input bool IgnoreSunday=true; // Ignore Sunday
input bool IgnoreSaturday=true; // Ignore Saturday

input string _sepBufferVisibility=""; // /////// Buffer visibility
input bool ShowHighBuffer=true; // High
input bool ShowCloseBuffer=true; // Close
input bool ShowLowBuffer=true; // Low

input string _sepProbeVisibility=""; // /////// Probe visibility
input bool ShowHighProbe=true; // High
input bool ShowCloseProbe=true; // Close
input bool ShowLowProbe=true; // Low

input string _sepProbeColor=""; // /////// Probe color
input color HighColor=C'83,173,52'; // High
input color CloseColor=C'83,173,52'; // Close
input color LowColor=C'83,173,52'; // Low

input string _sepProbeSize=""; // /////// Probe size
input int HighSize=2; // High
input int CloseSize=2; // Close
input int LowSize=2; // Low

input string _sepCustomLabel=""; // /////// Data window label
input string HighLabel="P.Day High"; // High
input string CloseLabel="P.Day Close"; // Close
input string LowLabel="P.Day Low"; // Low

string HighProbeName="HighPrevious"+IntegerToString(TargetTimeFrame)+IntegerToString(HoursShift)+IntegerToString(MinutesShift);
string CloseProbeName="ClosePrevious"+IntegerToString(TargetTimeFrame)+IntegerToString(HoursShift)+IntegerToString(MinutesShift);
string LowProbeName="LowPrevious"+IntegerToString(TargetTimeFrame)+IntegerToString(HoursShift)+IntegerToString(MinutesShift);

double PeriodHighBuffer[];
double PeriodCloseBuffer[];
double PeriodLowBuffer[];

PeriodData TempData;
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
PeriodData CalculateCommonSRData(datetime targetTime,TimeRange &periodRange)
  
  {
   if(TempData.PeriodRange.StartTime==periodRange.StartTime &&
      TempData.PeriodRange.EndTime==periodRange.EndTime)
      return( TempData );

   PeriodData result;

   int firstBar= iBarShift(Symbol(),Precision,periodRange.StartTime);
   int lastBar = iBarShift(Symbol(),Precision,periodRange.EndTime);

   datetime firstBarTime= iTime(Symbol(),Precision,firstBar);
   datetime lastBarTime = iTime(Symbol(),Precision,lastBar);

   int startBar=lastBar;
   int bars=firstBar-lastBar+1;

   int highestBar= iHighest(Symbol(),Precision,MODE_HIGH,bars,startBar);
   int lowestBar = iLowest(Symbol(),Precision,MODE_LOW,bars,startBar);
   
   result.PeriodRange= periodRange;
   result.PeriodHigh = iHigh(Symbol(),Precision,highestBar);
   result.PeriodClose= iClose(Symbol(),Precision,lastBar);
   result.PeriodLow=iLow(Symbol(),Precision,lowestBar);

   TempData=result;
   return( result );
   
  }

In my enter trade section I have tried a variety of codes to link them for example: DayHigh = TempData.PeriodHigh etc.. which just returns 0.

The indicator codes looks very useful but can anyone help me use it to get the high low information to use as buy/sell stop process?