Python How to calculate the quantity by investment and leverage - page 2

I will give a short snippet from my code, just to help you understand, it does not compile, nor is it complete....

            #ifndef __MQL4_COMPATIBILITY_CODE__
            if(!(::SymbolInfoMarginRate(symbol, ((bShort) ? ORDER_TYPE_SELL : ORDER_TYPE_BUY), margin_rate, maintenance_rate)))
            { return(NULL); }
            #endif
        }


    // Select calculation type

        switch(calc_mode)
        {
            case SYMBOL_CALC_MODE_FOREX:                    margin_rate         = (margin_maintenance) && (maintenance_rate > NULL) ? maintenance_rate : margin_rate;
                                                            symbol_leverage     = MathMax((int)((margin_rate > 1.0) ? (account_leverage / margin_rate) : account_leverage), 1);
                                                            return(((vol_size * contract_size) / account_leverage) * margin_rate);

Margin Initial is only used for following calculation modes:

SYMBOL_CALC_MODE_FUTURES
SYMBOL_CALC_MODE_EXCH_FUTURES
SYMBOL_CALC_MODE_EXCH_FUTURES_FORTS

So why are you still using values, that are not applicable, obviously?

You need to apply some brains to the code I posted. - You are looking for margin_rate, as can be seen by my code.

symbol_leverage     = MathMax((int)((margin_rate > 1.0) ? (account_leverage / margin_rate) : account_leverage), 1);

Is it so, that nobody here understands the code, I've posted? - Or is it in fact you need spoon feeding the solution?

It is very hard to determin, if someone is simply not applying their brains, or are in fact not capable of reading the code.... - How am I supposed to tell the difference?

EDIT:

BTW, margin_maintenance in my code is a boolean operator, which determines, if you are querying for maintenance margin or for current margin rate...

Maybe you should first get familliar with margin and how it works, as it seems, lots of people have trouble with understanding how it works. But, if anyone is serious about their foregoing in trading, this should be basics, that need to be understood. - Thats almost like if you cannot read or write, but want to be an author... - Then first learn how to read and write, I would suggest, at least.

Sry but i dont think I am advanced in programming. Is a hobby and I have little experience with complex things.

I have tryied your example and it give the right leverage only for one symbol of 5 tested and only if I devide the result bu 100

int CalculateSymbolLeverage(const string symbol)
  {
  
   int leverage=-1;
   double margin=0.0;
   double lots=1.0;
   
   if(OrderCalcMargin(ORDER_TYPE_BUY,symbol,lots,SymbolInfoDouble(symbol,SYMBOL_ASK),margin) && margin > 0)
     {
      double tickValue = SymbolInfoDouble(symbol,SYMBOL_TRADE_TICK_VALUE);
      double tickSize = SymbolInfoDouble(symbol,SYMBOL_TRADE_TICK_SIZE);
      double lotValue = tickValue * SymbolInfoDouble(symbol,SYMBOL_ASK) / tickSize;
      leverage=(int)MathRound(lotValue/margin);
     }
   
   return leverage;
  }

I have tried this code modified for python but it also give wrong values for a lot of symbols for example it gives 500 for symbols with 100 and everybody say is the tick value wrong. Now I presume I modified right. like I use ordin_calc_margin for margin value