Don't tell me there isn't a single command in mql4 to count decimals from a value or variable

New comment
 

Someone has already solved a similar problem, but the solution seems too complicated to me. https://www.mql5.com/en/forum/156865 Example: I have value of RSI 73,21 or a variable that is keep storing: 

eu=iRSI("EURUSD",_Period,14,PRICE_CLOSE,0);eu=NormalizeDouble(eu,2);
If value is 73.21 I need result 2 If value is 73.2 I need result 1 If value is 73 I need result 0 If there isn't a single command so is it possible to solve this without any loop, only using conditions?

 
losdelamos: Someone has already solved a similar problem, but the solution seems too complicated to me. https://www.mql5.com/en/forum/156865 Example: I have value of RSI 73,21 or a variable that is keep storing: If value is 73.21 I need result 2 If value is 73.2 I need result 1 If value is 73 I need result 0 If there isn't a single command so is it possible to solve this without any loop, only using conditions?

There is no such common function because floating point numbers are not "decimal". They are binary. Try to learn how floating point numbers on computers work and don't use NormalizeDouble unless you know what you are doing.

Forum on trading, automated trading systems and testing trading strategies

Normalizedouble

William Roeder, 2023.02.10 15:58

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.
              (MT4 2013)) (MT5 2022))

  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)

 
losdelamos: If value is 73.21 I need result 2 If value is 73.2 I need result 1 If value is 73 I need result 0

trying to get the number of decimal digits from a number (not a symbol) - MQL4 programming forum #1 (2015)
How to get the number of digits of the minimum volume? - Expert Advisors and Automated Trading - MQL5 programming forum (2022)

New comment