How to count Bars in expert mql4 mql5 ?

[[Deleted]]

   int Bar = Bars(_Symbol,_Period);
   
   for (i = 0; i < Bar + 1; i++)
   {
   // my condition
   }

   int Bar = Bars(_Symbol,_Period);
   
   for (i = Bar - 1; i > 0; i--)
   {
   // my condition
   }

it's does'nt work, showed critical error in journal.

 

need's help, please and thanks you. 

[Marco vd Heijden]

         for(i=iBars(symbol_string,time_frame)-1;i>-1;i--)
           {
    
           }

so

   int Bar = Bars(_Symbol,_Period);
   
   for (i = Bar - 1; i > -1; i--)
   {
   // my condition
   }

but it might be some other problem somewhere in your code.

check the line number.

[Marco vd Heijden]

   int Bar = Bars;
   
   for (i = Bar - 1; i > -1; i--)
   {
   // my condition
   }

or

   for (i = Bars - 1; i > -1; i--)
   {
   // my condition
   }

[[Deleted]]

Marco vd Heijden:

or

thanks you so much