Highest & Lowest Open/Close Price for a Loop

   double tMxOC=0;
   for(int i=20; i>=1; i--)
   {
      double mxOC=MathMax(iOpen(Symbol(),60,i),iClose(Symbol(),60,i));
      if(mxOC>=tMxOC) {
      tMxOC=mxOC;
      }
   }
 
   {Alert(Symbol()+" Highest OC Price : "+DoubleToStr(tMxOC,5)); }
 
// This loop works and the highest Open/Close Prices are shown
 
//+------------------------------------------------------------------+
   double tMnOC=0;
   for(int i=20; i>=1; i--)
   {
      double mnOC=MathMin(iOpen(Symbol(),60,i),iClose(Symbol(),60,i));
      if(mnOC<=tMnOC) {
      tMnOC=mnOC;
      }
   }

   {Alert(Symbol()+" Lowest OC Price : "+DoubleToStr(tMnOC,5)); }
 
// This loop is NOT working and the lowest Open/Close Prices are shown "0", no price at all.

Quoting Jagg

Disliked

You have to initialize tMnOc with DBL_MAX (or a high digit like 999999) not with 0.

Ignored

   double tMnOC=99999999;
   for(int i=20; i>=1; i--)
   {
      double mnOC=MathMin(iOpen(Symbol(),60,i),iClose(Symbol(),60,i));
      if(mnOC<=tMnOC) {
      tMnOC=mnOC;
      }
   }
 
   {Alert(Symbol()+" Lowest OC Price : "+DoubleToStr(tMnOC,5)); }