Double to string with NormalizeDouble

MQL Language
#1

Hi All,

i am trying to convert double to string in MQL5, the NormalizeDouble is such a failure as it get numbers such as 0.07000000000000001 and 0.9399999999999999

i have created the below function, but it can only filter our cases as 0.9399999999999999, but fails with 0.07000000000000001

double RNormalizeDouble(double val, int places){
   
   int index = StringFind(val, ".");
   
   string substring = StringSubstr(val, index, places+1);
   if(StringGetCharacter(substring, StringLen(substring)-1) == "0"){
      substring = StringSubstr(substring, 0, StringLen(substring)-2);
   }
   Print("Debug ",substring);
   string WholeNum = StringSubstr(val, 0, index-1);
   string res = WholeNum + substring;
   return StringToDouble(res);
}

Sample of the output

PN	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.9399999999999999

LM	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .93

FE	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.93

II	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.9399999999999999

JP	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .93

EN	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.93

MN	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.9399999999999999

RE	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .93

PD	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.93

EM	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.79

QL	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .79

LG	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.79

PG	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.63

JO	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .63

JP	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.63

NF	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.64

RG	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .64

EG	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.64

DO	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.34

EO	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .34

DD	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.34

DD	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.35

RM	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .35

GM	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.35

KR	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.06

HJ	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .06

NJ	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.06

FL	0	00:52:30.450	Core 1	2017.01.02 06:24:41   A -0.07000000000000001

QN	0	00:52:30.450	Core 1	2017.01.02 06:24:41   Debug .07

EG	0	00:52:30.450	Core 1	2017.01.02 06:24:41   B -0.07000000000000001

``
#2

Do NOT use NormalizeDouble , EVER. For ANY Reason. It’s a kludge, don’t use it. It’s use is always wrong