It's pretty easy to modify the EA yourself to use variable lots.

In the public declarations section at the top, add the following line right below the declaration for Entry_Amount:

static input bool Auto_Lot = false; // Auto lot size

Scroll down to the OpenPosition function, and add this code at the bottom of the declarations section (where it says "color  arrowColor ="):

      double Order_Size = Entry_Amount * (AccountBalance() / 10000);
      if (Auto_Lot == false) Order_Size = Entry_Amount;

And then go through the rest of that function, replacing every instance of Entry_Amount with Order_Size (should be three instances).

i have done it now like this.

//+------------------------------------------------------------------+
//|LOTCALCULATION                                                    |
//+------------------------------------------------------------------+
double NormalizeEntrySize(double size) {
   double minlot  = MarketInfo(_Symbol, MODE_MINLOT);
   double lotstep = MarketInfo(_Symbol, MODE_LOTSTEP);

   if (size <= minlot)
       return (minlot);

   int steps = (int) MathRound((size - minlot) / lotstep);
   size = minlot + steps * lotstep;

   if (size >= Maximum_Lots)
       size = Maximum_Lots;
       
   size = NormalizeDouble(size, digits);   

   return (size);
}   

and in OpenPosition

added this

  int margin=(int) MarketInfo(_Symbol,MODE_MARGINREQUIRED);
  double Entry_Amount=(Entry_Percent/100)*AccountEquity()/margin;
  Entry_Amount = NormalizeEntrySize(Entry_Amount);

  if(useFixedLot==true)
  Entry_Amount = Entry_Lots;

In the public declarations section at the top, add the following line right below the declaration for Entry_Amount:

static input bool Auto_Lot = false; // Auto lot size

Scroll down to the OpenPosition function, and add this code at the bottom of the declarations section (where it says "color  arrowColor ="):

      double Order_Size = Entry_Amount * (AccountBalance() / 10000);
      if (Auto_Lot == false) Order_Size = Entry_Amount;

And then go through the rest of that function, replacing every instance of Entry_Amount with Order_Size (should be three instances).

I have such option in my ToDo list. However, now I'm overloaded with other tasks, so it will take some time to to add it.
I'm currently working on Walk - Forward analysis module and hope to release it within next two weeks.

Hi, Popov

Walk - Forward Analysis module that you mention to, where the module is in EA Studio or FSB Pro or both of them?

if i want to change an EA that i can decide in settings if it work with fixed lot size or dynamic percentage lot

How can i solve that