previous value of indicator ?

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At this step , I have :

double var
double var1

var = Formula;

now I want to have
var1 = previous value of Formula

If Formula was an Array such as High I would just write
var1 = High[1]

But writing
var1 = Formula[1]

is not recognized.

who could help ? Thanks

In general, the question is : how to transform the value of a formula into an Array
 
Hi maestrade,

This would not work. If you are coding a formula it will only return a single value so you would just reference as normal variable not as an array ie[]. If you want to return an array as your formula you would need to create a function or loop to build the array, then you could reference it as an array. Here is an example of a funciton 
bool  GetArray( double& anArray[])
{
     for (i = bars; i >= 0; i--)
     {
         anArray[i] = some formula;
     }
}

// now you could call
double myArray[100];
GetArray(myArray);
double val = myArray[1];



This code would still need work as you would need to make sure that the array is big enough or add resizing code but it should give you the basic idea.

Pedro

 
Hello Maestrade,

Try this

double var;
double var1;

var1 = var;
var = Formula;


Thanks
EK

At this step , I have :

double var
double var1

var = Formula;

now I want to have
var1 = previous value of Formula

If Formula was an Array such as High I would just write
var1 = High[1]

But writing
var1 = Formula[1]

is not recognized.

who could help ? Thanks

In general, the question is : how to transform the value of a formula into an Array


	          




	          

		          

	          

          

        

        


            

          

              
	          

		          
		          
                
		          



                 
	          


	          

		          Pedro,
 
 Thanks for your time
 Unfortunately your suggestion does not work at all. First, the way you define the function is not proper.
 
 If you think it works, could you write the code for MACD using the sample given by Metaquotes 
 How to get the previous value of the MACD or better the value of the MACD n bars before ?
	          




		          
	          

		          

	          

          

        




  


  

    

      

        
      

    

    

          
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