i want add comment to chart

[Saeid Reza Bahman Abadi]

i want add signal comment to chart in mql4  every 1 hr 

void OnTick()
  {
//---
      string symbols=""; 
     ***if(iVolume(NULL,timeframe,0)<=1){
     
      for(int i=0; i<SymbolsTotal(true); i++)
        { 
         int digits=MarketInfo(Symbol(),MODE_DIGITS); 
         double purplemagicline=iCustom(SymbolName(i,true),timeframe,"",2,1);
         purplemagicline=NormalizeDouble(purplemagicline,digits);
         
         double blueline=iCustom(SymbolName(i,true),timeframe,"",1,1);
         blueline=NormalizeDouble(blueline,digits);
         
         double redline=iCustom(SymbolName(i,true),timeframe,"",3,1);
         redline=NormalizeDouble(redline,digits);
         
         double greenline=iCustom(SymbolName(i,true),timeframe,"",4,1);
         greenline=NormalizeDouble(greenline,digits);
         
         if((----))
         if((--))
          symbols+=SymbolName(i,true)+"\n";    
        }      
    
     }   
      Comment("\n",symbols);
   
  }

this code 

but it comment A moment and Fade.

I want my code to be reviewed once a hour and not commented on

[William Roeder]

1.          if((----))
            if((--))
   

   Don't post code that won't even compile.

2.     ***if(iVolume(NULL,timeframe,0)<=1){

   For a new bar test, Bars is unreliable (a refresh/reconnect can change number of bars on chart,) volume is unreliable (miss ticks,) Price is unreliable (duplicate prices and The == operand. - MQL4 programming forum.) Always use time.

   I disagree with making a new bar function, because it can only be called once per tick. A variable can be tested multiple times.
             New candle - MQL4 programming forum

3. Saeid Reza Bahman Abadi: but it comment A moment and Fade.
   

   Of course, it does. What does your code do when it is not the start of a new bar?

   void OnTick(){
         string symbols=""; 
         Comment("\n",symbols);   
     }