Thank you

Hi Popov, could you please check my EA?

No matter how I change the "entry percent" and "maximum entry lot" value, it always use the "maximum entry lot" size ? so if put 10 on it and 2 on "entry percent", it'll try to open 10 lot, regardless the account balance.

Unfortunately, it is never easy when you deal with MetaTrader.

"SymbolInfoDouble(_Symbol,SYMBOL_MARGIN_INITIAL)" doesn't work and returns 0 for some brokers.

If you have such case, you have to use other means of finding the required margin.

Here is the code I'm using in the FSB Pro experts:

   MqlTick tick;
   SymbolInfoTick(_Symbol,tick);
   double margin=SymbolInfoDouble(_Symbol,SYMBOL_MARGIN_INITIAL);
   if(margin<sigma)
      bool ok=OrderCalcMargin(ORDER_TYPE_BUY,_Symbol,1,tick.ask,margin);
   if(margin<sigma)
      margin=tick.bid*SymbolInfoDouble(_Symbol,SYMBOL_TRADE_CONTRACT_SIZE)/100;

The complete "OpenPosition" function for the MT5 experts will look like that:

Trade Safe and have luck with your MQL codding!

Hi Popov, if the broker only allows mini lot (0.1) step/increment, which code should I change?

The backtest show this error : OrderSend error 131, after I searched in Google, it's said the error is due to broker doesn't allow micro lot increment.

I test it using fixed lot version with 0.11 lot and it give the same error, but when I change the lot size to round number such as 0.1 or 0.2, it works well. So I'm sure the problem is the allowed increment

You are correct. You have to make the following changes:

    Entry_Amount=MathMax(Entry_Amount,0.1);
    Entry_Amount=NormalizeDouble(Entry_Amount,1);

This must work. You don't need to set additional increment value because it is most probably 0.1 and when the NormalizeDouble(Entry_Amount,1) function round it to the first decimal digit, it will work fine.

Yes, it is possible. You can use the follow function (taken from the FSB Pro scripts):

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);
}

Put this function somewhere in the file and use it like that:

Entry_Amount = NormalizeEntrySize(Entry_Amount);

This error is because the NormalizeEntrySize is inside the OpenPosition function. MQL doesn't allow nesting functions. The solution is very simple - move NormalizeEntrySize before OpenPosition function.

yonkuro

Thanks for asking these features and developing solutions...

These are most helpful... I had been asking a couple of them and now see in this thread that you are months ahead of me..

Thank you again!

if i want to have both. Entry amount fix and entry amount with percent. If Lot size percent true...how will be the code for ea studi portfolio or generall normal strats`?

Dear Popov,

can you please make an update for this old topic? I compared the code from a fresh new strategy with the old one from the EA updated here and it seems to me that the coding is different.

I am very interested (as you know ) in using percentages instead of lots and I haven't found a solution yet.

I tried to use FSB because of the percentage, but still I have more other problems there. With Expert Advisor I miss only this function, otherwise it is PERFECT !

thanks
Sebastian