MathRound fails for one particular number - page 2

[William Roeder]

Print out your values to the precision you want. Do NOT use NormalizeDouble, EVER. For ANY Reason. It's a kludge, don't use it. It's use is always wrong

• SL/TP (stops) need to be normalized to tick size (not Point.) (On 5Digit Broker Stops are only allowed to be placed on full pip values. How to find out in mql? - MQL4 and MetaTrader 4 - MQL4 programming forum) and abide by the limits Requirements and Limitations in Making Trades - Appendixes - MQL4 Tutorial and that requires understanding floating point equality Can price != price ? - MQL4 and MetaTrader 4 - MQL4 programming forum
• Open price for pending orders need to be adjusted. On Currencies, Point == TickSize, so you will get the same answer, but it won't work on Metals. So do it right: Trailing Bar Entry EA - MQL4 and MetaTrader 4 - MQL4 programming forum or Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 and MetaTrader 4 - MQL4 programming forum
• Lot size must also be adjusted to a multiple of LotStep and check against min and max. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right.

[Anton Christiaan Lombard]

Fernando Carreiro #:

That is not the documented way of using the MathRound() function. There is only one parameter, not two! It won't even compile that way, unless you have done something else entirely!

Documentation wrong?

https://www.mql5.com/en/docs/standardlibrary/mathematics/stat/mathsubfunctions/statmathround

[Fernando Carreiro]

@Anton Christiaan Lombard #: Documentation wrong? https://www.mql5.com/en/docs/standardlibrary/mathematics/stat/mathsubfunctions/statmathround

You looking at a different function/method in the documentation. This is the one to which I am referring ... Documentation on MQL5: Math Functions / MathRound

I even gave you the link in my post ...

Fernando Carreiro #: That is not the documented way of using the MathRound() function. There is only one parameter, not two! It won't even compile that way, unless you have done something else entirely!

[Anton Christiaan Lombard]

Fernando Carreiro #:

You looking at a different function/method in the documentation. This is the one to which I am referring ... Documentation on MQL5: Math Functions / MathRound

I even gave you the link in my post ...

Fernando Carreiro #: That is not the documented way of using the MathRound() function. There is only one parameter, not two! It won't even compile that way, unless you have done something else entirely!

Appreciated but one solution is to #include <Math\Stat\Math.mqh> and then the overrides with the decimal exists. Just a matter of wading thru the docs for various options I suppose.

[amrali]

Better use MathRound(double, digits) from my library if you seek the correct results. 

https://www.mql5.com/en/code/20822

#include <math_utils.mqh>
void OnStart()
{
   double number = MathRound(0.6899999999999999,2);
   Print(number);
}

// 0.69