Cannot get the values of the lower band of the Bollinger Band

[danielth]

Hello,

I want to retreive the value of the lower band of the Bollinger bands. I tried the following code :

ArraySetAsSeries(lower_band,true);
handle=iBands(NULL,0,20,2.0,0,PRICE_CLOSE);
CopyBuffer(handle,2,0,2,lower_band);

The value I get for lower_band[1] is the central value (base_band[1]) of the indicator and not the higher or lower band value. 

I tried other parameters with the same result.

Any idea ? 

[Bogdan Alin Baltatu]

Try this code:

int handle;
double lower_band[];
ArraySetAsSeries(lower_band,true);
handle=iBands(NULL,0,20,0,2.0,PRICE_CLOSE);
CopyBuffer(handle,2,0,2,lower_band);
Print(lower_band[0]);

Bogdan Baltatu, mqlmagazine.com

[danielth]

Thanks, it works !

But the Help file is not well written and it should be corrected. Here is a copy of the iBands Help file :

 

int  iBands(
   string              symbol,            // symbol name
   ENUM_TIMEFRAMES     period,            // period
   int                 bands_period,      // period for average line calculation
   double              deviation,         // number of standard deviations
   int                 bands_shift,       // horizontal shift of the indicator
   ENUM_APPLIED_PRICE  applied_price      // type of price or handle
   ); 

Lines 5 and 6 are inverted, which misled me.

[Rashid Umarov]

danielth:

Thanks, it works !

But the Help file is not well written and it should be corrected. Here is a copy of the iBands Help file :

 

Lines 5 and 6 are inverted, which misled me.

We'll fix it tomorrow. Sorry.

[danielth]

Hello Mr Rosh, 

I've just downloaded the Help File.

The order of the parameters have not been changed yet and inversion between lines 5 and 6 (Shift and Deviation) remains.

[Rashid Umarov]

It's a bit strange because it was changed in the online version of Documentation- iBands:

The function returns the handle of the Bollinger Bands indicator.

int  iBands(    string              symbol,            // symbol name    ENUM_TIMEFRAMES     period,            // period    int                 bands_period,      // period for average line calculation    int                 bands_shift,       // horizontal shift of the indicator    double              deviation,         // number of standard deviations    ENUM_APPLIED_PRICE  applied_price      // type of price or handle    );

[Rashid Umarov]

I've just downloaded and checked - it's OK. You should get the latest version from https://www.mql5.com/files/docs/mql5.chm (1.4 Mb)

[danielth]

Thank you for your answer.

I have downloaded the Help File as indicated (mine, dated 27Jan2010, was obviously not the latest one - but didn't update automatically ?)

However, when I doubleclick the File, only the left window works properly, the right one showing : "Navigation cancelled - try again the address"

Any clue to this problem ?

[Rashid Umarov]

danielth:

However, when I doubleclick the File, only the left window works properly, the right one showing : "Navigation cancelled - try again the address"

Any clue to this problem ?

It's the eternal question - https://www.mql5.com/en/forum/112960

[danielth]

Sorry

I didn't know