MT4:NormalizeDouble

[Mohammed Abdulwadud Soubra]

NormalizeDouble(Close[0],0);

 

a simple question please:

in order to remove the digits after the .

how to get the integer value that will not be modified

I am getting 2 for values like 1.6 while I need 1 

[Snelle Moda]

Use typecasting.

int nMy_Value = int(Close[0]);

Check this:

https://www.mql5.com/en/docs/basis/types/casting

[Sabil Yudifera]

maybe 

int y = (int) NormalizeDouble(Close[0],0);

[William Roeder]

1. 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 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 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 forum or Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 forum
   • Lot size must also be adjusted to a multiple of LotStep. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right.

2. If you want the integer part of a double just cast it int y = int(d)
   
3. If you want the nearest multiple of a double, (round numbers,) compute it.
   double MathNearest(  double v, double to){ return to * MathRound(v / to); }
   double MathRoundDown(double v, double to){ return to * MathFloor(v / to); }
   double MathRoundUp(  double v, double to){ return to * MathCeil( v / to); }
   :
   double   pip        = StringFind(_Symbol,"JPY") < 0 ? 0.01 : 0.0001;
   int      pipDigits  = (int)MathLog10(pip/_Point);
   int      slippage   = 3 * int(pip / _Point);
   
   double market    = Bid;                             // 1.012345 122.012
   double lower100  = MathRoundDown(market, 100*pip);  // 1.01200  122.00
   double upper100  = MathRoundUp(  market, 100*pip);  // 1.01300  123.00
   
   
   

[Mohammed Abdulwadud Soubra]

Snelle Moda:

Use typecasting.

int nMy_Value = int(Close[0]);

Check this:

https://www.mql5.com/en/docs/basis/types/casting

whroeder1:

1. 
   
2. If you want the integer part of a double just cast it int y = int(d)
   
3. If you want the nearest multiple of a double, (round numbers,) compute it.
   

 

Thanks all for your help 

[Daniel Cioca]

William Roeder #:

1. 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 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 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 forum or Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 forum
   • Lot size must also be adjusted to a multiple of LotStep. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right.

Hello!

Thanks for this.

If instead of this:

double NormalizePrice(double p, string pair=""){
        // https://forum.mql4.com/43064#515262 zzuegg reports for non-currency DE30:
        // MarketInfo(chart.symbol,MODE_TICKSIZE) returns 0.5
        // MarketInfo(chart.symbol,MODE_DIGITS) return 1
        // Point = 0.1
        // Prices to open must be a multiple of ticksize 
    if (pair == "") pair = Symbol();
    double ts = MarketInfo(pair, MODE_TICKSIZE)
    return( MathRound(p/ts) * ts );

I use this:

double GetNormalised(double price)
  {
   return(StrToDouble(DoubleToStrMorePrecision(price,_Digits)));
  }

Or this :

double nNormalizePrice(double price)
  {
   return StrToDouble(StringSubstr(DoubleToStr(price),0,_Digits+2));
  }

The diference between the three of them, is that first two versions are rounding up last digit.

I tried to normalize 0.123456789 number.

First two versions if  apply to a 5 digit pair, will give result 0.12346, the last version will give 0.12345