int iTradingLots = (int)Math.Floor(iSize * Equity / (PipsToMoney(100, iBar) * 100));

  if (iTradingLots < 1)
       iTradingLots = 1;
  else if (iTradingLots > MaxOpenLots)
       iTradingLots = MaxOpenLots;

Where iSize is percent of the equity that will be use to cover the required margin

FSB can control dynamically the number of Entry Lots, Lots for Adding and the Lots for Reducing the position.

The difference is that FSB uses Account Equity but the expert you show uses the Account Balance. This is not important for the opening because the balance is equal to the equity. The difference is for an averaging when the current position is at significant profit or loss.

//---- input parameters
extern bool      MoneyManagement=true;
extern double       Risk=10;

//+------------------------------------------------------------------+
//| expert start function                                                      |
//+------------------------------------------------------------------+
int start()
  {
         if (MoneyManagement)
   {
     double Leverage=AccountLeverage();
            lots=MathFloor((AccountBalance()*Risk*(Leverage/100))/(MarketInfo(Symbol(),MODE_LOTSIZE)*MarketInfo(Symbol(),MODE_MINLOT)))*MarketInfo(Symbol(),MODE_MINLOT);
   }
   
   if(MoneyManagement==false)
   {
     lots=lots;
   } 

//---- rest of the strategy code

return(0);
  }

(No problem with the Russian )

That is the important:

       int bar_time = FileReadInteger(hst_handle, LONG_VALUE);
       double bar_open = FileReadDouble(hst_handle, DOUBLE_VALUE);
       double bar_low = FileReadDouble(hst_handle, DOUBLE_VALUE);
       double bar_high = FileReadDouble(hst_handle, DOUBLE_VALUE);
       double bar_close = FileReadDouble(hst_handle, DOUBLE_VALUE);
       double bar_volume = FileReadDouble(hst_handle, DOUBLE_VALUE);

New indicator: Round Number

It allows enter/exit the market at the support/resistant levels (round price level). It is possible to set a price shift to enter blow or above the level.