Volume help me

Antonio Gerbasio 2021.02.25 12:03

kindly, I am a beginner in programming. I wanted to understand the last number, shown by yellow color. What is it for?. Thank you if I can I would like to start a course, (mql5 programming) can you tell me some. Thank you

double volume=0.0;
   if(   StringCompare(_Symbol, "USTEC")==0 ||
         StringCompare(_Symbol, "US500")==0 ||
         StringCompare(_Symbol, "US30")==0     )                                                                                                                                                       
   {                                                                                                                                                                       

      volume=NormalizeDouble((getProfit()/((customAtr *100)*(0.01/SymbolInfoDouble("EURUSD", SYMBOL_BID)))), 1);
   }
   else if(StringCompare(_Symbol, "US2000")==0)
   {
      volume=NormalizeDouble((getProfit()/((customAtr *100)*(0.01/SymbolInfoDouble("EURUSD", SYMBOL_BID)))), 1);
   }
   else if(StringCompare(_Symbol, "JP225")==0)
   {
     volume=NormalizeDouble((getProfit()/((customAtr *100)*(0.01/SymbolInfoDouble("EURJPY", SYMBOL_BID)))), 1);
   }
   else if(StringCompare(_Symbol, "AUS200")==0)
   {
      volume=NormalizeDouble((getProfit()/((customAtr *100)*(0.01/SymbolInfoDouble("EURAUD", SYMBOL_BID)))), 0);
   }
   else if(StringCompare(_Symbol, "XAUUSD")==0)
   {
      volume=NormalizeDouble((getProfit()/((customAtr *10000)*(0.01/SymbolInfoDouble("EURUSD", SYMBOL_BID)))), 2);
   }