Why does the NormalizeDouble function only work sometimes?

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The StopLossPrice always returns the correct value. However, the price it returns is not always the correct amount of decimal places. Does anyone know why and how it can be corrected?

Thank you 


double StopLossPrice()
   {// Buying Opportunities
      if(BullishCandlestick() == true && BullishHammer() == true)
      {
         if(GetPipValue() == 0.0001)
         {
         stopLossPrice = NormalizeDouble(((iClose(NULL, NULL, 1)) - (stopLossinPips * GetPipValue())),5);
         }
         else if(GetPipValue() == 0.01)
         {
         stopLossPrice = NormalizeDouble(((iClose(NULL, NULL, 1)) - (stopLossinPips * GetPipValue())),3);
         }
         return stopLossPrice;
      }
      else if(BullishCandlestick() == false && BullishHammer() == true)
      {
         if(GetPipValue() == 0.0001)
         {
         stopLossPrice = NormalizeDouble(((iClose(NULL, NULL, 1)) - (stopLossinPips * GetPipValue())),5);
         }
         else if(GetPipValue() == 0.01)
         {
         stopLossPrice = NormalizeDouble(((iClose(NULL, NULL, 1)) - (stopLossinPips * GetPipValue())),3);
         }
         return stopLossPrice;
      }
}
 
luxecapital: not always the correct amount of decimal places.

You used NormalizeDouble, It's use is usually wrong, as it is in your case.

  1. Floating point has a infinite number of decimals, it's your not understanding floating point and that some numbers can't be represented exactly. (like 1/10.)
              Double-precision floating-point format - Wikipedia, the free encyclopedia

    See also The == operand. - MQL4 programming forum (2013)

  2. Print out your values to the precision you want with DoubleToString - Conversion Functions - MQL4 Reference.

  3. SL/TP (stops) need to be normalized to tick size (not Point) — code fails on non-currencies.
              On 5Digit Broker Stops are only allowed to be placed on full pip values. How to find out in mql? - MQL4 programming forum (2011)

    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 programming forum (2012)

  4. 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 non-currencies. So do it right.
              Trailing Bar Entry EA - MQL4 programming forum (2013)
              Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 programming forum (2012)

  5. 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. (2013)

  6. MathRound() and NormalizeDouble() are rounding in a different way. Make it explicit.
              MT4:NormalizeDouble - MQL5 programming forum (2017)
              How to Normalize - Expert Advisors and Automated Trading - MQL5 programming forum (2017)

  7. Prices you get from the terminal are already correct (normalized).

  8. PIP, Point, or Tick are all different in general.
              What is a TICK? - MQL4 programming forum (2014)

 
luxecapital:

The StopLossPrice always returns the correct value. However, the price it returns is not always the correct amount of decimal places. Does anyone know why and how it can be corrected?

Thank you 


I didn't think I needed to normalise either but sometimes the stop loss price returns multiple decimal points. For the most part its fine but currencies like CADJPY or NZDJPY do not work. How do I amend the code?

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