past values

[jaimeog]

Hi,

Is there any way to get past values of studies like
the bollinger bands?

have a great day,

Jaime

[ACM]

Jaime
The syntax on how to do it depends on which Bollinger function you are using (ie ef1 or efs2).
If you are using the efs2 function then you can retrieve historical values in two ways
In the first method you declare the study then you use the .getValue() method to retrieve past values. For example

var BBstudy = upperBB(20,2);//declare the study
var currentBBstudy = BBstudy.getValue(0);//current value
var prevBBStudy = BBStudy.getValue(-1);//value at the prior bar
//use (-2) for two bars ago, (-3) for three bars ago etc 

The other method is to access the value directly as in the following example

var currentBBStudy = upperBB(20,2,0);//current value
var prevBBStudy(20,2,-1);//value at the prior bar 

Notice that in this second example I am not declaring the study but I am accessing the values directly by adding the barIndex parameter (ie 0, -1, etc)
Alex