

Do you know the troubles with the doubles? Look here. So instead of (ima1 < ima2) (use the SRCbutton for code !!) you should (must) use: if (ima2  ima1 > Point*0.1) ... 



OK. i have more and more years of experience in many progrmatical language as C, C++, C#, Java, etc. and use (normally) a library of functions to solve this problem when I trafer a program between diferent version of compiler / interprete... In this case (mql4) I have only a one year of experiecne and I write many scripts, Ea, classes and lib. First I read all entire online manual an many and many articles... BUT I ignore an important note present in the on line documentations : https://www.mql5.com/en/articles/1561 said Note that in trading operations it is impossible to use the unnormalized prices, whose accuracy exceeds at least by one digit demanded by a trading server.The StopLoss, TakeProfit and Price values for the pending orders should be normalized with the accuracy, which value is stored in predetermined variable Digits.
In section: 3. Function NormalizeDoubleThe function NormalizeDouble (double value, int digits) rounds the floating point value to the given precision. Returns normalized value of the double type.For example: int start() { double a=3.141592653589; Alert("a=",DoubleToStr(NormalizeDouble(a,5),8)); return(0); } the result is: a=3.14159000 Note that in trading operations it is impossible to use the unnormalized prices, whose accuracy exceeds at least by one digit demanded by a trading server. 4. Check for equality of two double numbersIt is recommended to compare two double numbers using the function CompareDoubles(double number1,double number2) of the stdlib.mq4 library, which looks as: //++ // correct comparison of 2 doubles  //++ bool CompareDoubles(double number1,double number2) { if(NormalizeDouble(number1number2,8)==0) return(true); else return(false); }
Some confusion was originated for the result o f if statement... in many case it result as aspected by me. Thanks to Gooly and WhRoeder for cooperation and very fast response.


NormalizeDouble() does NOT what you think it does! As it returns a double and an double  by its definition and construction  is only the closest approximation to a 'human' number!What would work would be: bool CompareDoubles(double number1,double number2) { if( (int)MathRound((number1number2)/100000000.0) == 0 ) return(true); else return(false); } What if you use: #define equal(a,b) (fabs((a)(b))<0.000000001) ... double x = M_PI; if ( equal(x,0.0) ) { .. } else { .. } Hint. Watch your doubles in the debugger! 


3404 
WHRoeder: I was actually quite surprised to discover that a calculated lot size does not need to adjusted to a multiple of LotStep. MT4 will round it to the nearest correct value . You do need to check the max and min lot size though.

3206 
GumRai: How do you discover that ? If you saw that somewhere, it's certainly not always true. You have to "normalize" your lot from LotStep.I was actually quite surprised to discover that a calculated lot size does not need to adjusted to a multiple of LotStep. MT4 will round it to the nearest correct value . You do need to check the max and min lot size though. 
3404 
I have a script with two iMa (previous and actual (for example) into double var
double ima1 = iMA(Symbol(),useTimeFrame,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,1);
double ima2 = iMA(Symbol(),useTimeFrame,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0);
both are equal values: 1.08668
but at if statement this result as ima1 < ima2
if(ima1 < ima2) ....
My problem is not the source of vars values (in example above iMA) but the result of if statement with this double vars...
Anyone have a response..???