Automatic rounding of double MT5

[cmarconetti]

MT5 question, EA.

Hi,

Could not find a direct anwer to this strange issue.

I am simply setting-->   input double TP_Percent = 0.02; ---> in the input section of the code.

For some reason (TP_Percent is never changed in the code) when I call this variable for the first time it is transformed to 0.1 (!?). (I checked it with

a stop watch running a historical backtest)...

Is this a bug, is this some setting/rouding I overlooked?

Thank you in advance.

[Fernando Carreiro]

cmarconetti: MT5 question, EA. Hi, Could not find a direct anwer to this strange issue. I am simply setting-->   input double TP_Percent = 0.02; ---> in the input section of the code. For some reason (TP_Percent is never changed in the code) when I call this variable for the first time it is transformed to 0.1 (!?). (I checked it with a stop watch running a historical backtest)... Is this a bug, is this some setting/rouding I overlooked?

When running in the tester, these values are set and saved in the Inputs section of the Strategy Tester. Verify that you are not setting it to 0.1 there.

[cmarconetti]

Indeed, that was it. Thanks Fernando, always fast and reliable.

[Fernando Carreiro]

cmarconetti #: Indeed, that was it. Thanks Fernando, always fast and reliable.

You are welcome!

[Stephan Engberts]

I standard have a function, which uses 2 items as input from the user and after that, responds with the proper buy-in.

Input rules:

input double base_lot = 0.01;
input bool use_equity_lot = true;
input double equity_per_001 = 150;

Entry will be something like this:

ExtTrade.Buy(getAmountLots(),_Symbol,0.0,sl,tp);

Function to call:

double getAmountLots() {
   double div = base_lot;
   if (use_equity_lot) {
      double account_eq = AccountInfoDouble(ACCOUNT_EQUITY) / 100;
      div = account_eq / equity_per_001;
      if (div < 0.01) { div = 0.01; }
      div = NormalizeDouble(div, 2);
   }
   return div;
}