Strange indicator values

[Tobias Wolf]

Hi guys,

I`ve experienced some strange behaviour. Sometime I got a strange value back from the used indicator within the EA I`m writing. It`s not EMPTY_VALUE and not DBL_MAX.

BUY direction new 'SL_FRACTALS' tsl at -858993459

[kypa]

It's probably uninitialized.

You need to make sure all buffer entries get a value, either valid price if there is a fractal on this bar or zero (or whatever your empty value is).

[Tobias Wolf]

I`m using the build-in indicator, I thought it will be working as it should. How can I initialize the indicator buffers, this is being done in the indicator code, right?

   return iFractals(symbol,timeframe,mode,shift);

[kypa]

if(iFractals(symbol,timeframe,mode,shift)==high/low[shift])

(since Fractal values are not calculated but derived from price we can use == instead of the proper way to compare doubles, that is subtraction and <0.000001,)

Also you should write your thing in MQL5.

[Tobias Wolf]

Currently I do the following to find the last fractals, I use this in a trailing stop loss.

   double fractal;

   do

     {

      fractal=iFractals(Symbol(),Period(),mode,shift++);

     }

   while(fractal==EMPTY_VALUE || fractal==DBL_MAX || fractal==0);

--> Do you mean I can use the following?

--> while(iFractals(symbol,timeframe,mode,shift)==high/low[shift])

[nicholish en]

Tobias Wolf:

Currently I do the following to find the last fractals, I use this in a trailing stop loss.

   double fractal;

   do

     {

      fractal=iFractals(Symbol(),Period(),mode,shift++);

     }

   while(fractal==EMPTY_VALUE || fractal==DBL_MAX || fractal==0);

--> Do you mean I can use the following?

--> while(iFractals(symbol,timeframe,mode,shift)==high/low[shift])

No... he's talking about not using the == operator to compare doubles. Instead use 

bool doubles_equal(double x, double y)
{
   return (fabs(x - y) < _Point);
}