Array inside Array is correct?

[fly7680]

Hi, I'm trying to figure out if what I've written is correct or not, could I have some help?
The variable int O has [13] Array, so is it correct to skip it in the Y loop? Is it correct to insert Array O [Y] into Array Time []? Is also correct to assign to K = O [Y] ;?

I apologize for these trivial questions but I have some doubts about it.

Thank you

//Global scope
int O[13];    //Array for Index
int Y; int K; //Variable

// My code....
if(....){
  //Variables with Array for loop Y
  O[1]=i-3; O[2]=i-5; O[3]=i-8;  O[4]=i-11; O[5]=i-13; O[6]=i-15;O[7]=i-20; 
  O[8]=i-25;O[9]=i-30;O[10]=i-35;O[11]=i-40;O[12]=i-45;O[13]=i-50;
}

for(Y=13; Y>=1; Y--){
                       
   if(Time[O[Y]] <= Time[Max]) 
                          
     K=O[Y];
     ..........}

[Drazen Penic]

fly7680:

Hi, I'm trying to figure out if what I've written is correct or not, could I have some help?
The variable int O has [13] Array, so is it correct to skip it in the Y loop? Is it correct to insert Array O [Y] into Array Time []? Is also correct to assign to K = O [Y] ;?

I apologize for these trivial questions but I have some doubts about it.

Thank you

n-sized arrays are indexed from 0 to n-1.  

In your case -

• initialize array elements O[0] - O[12], 
• for loop should go from 12 to 0

[fly7680]

Thank you for the reply! I understand that I have to initialize the Array but I did not understand it well.

Initialize the Array O [] but then inside the Array Time [] what do I insert?

//Global scope
int O[13];    //Array for Index
int Y; int K; //Variable

// My code....
if(....){
  //Variables with Array for loop Y
  O[1]=i-3; O[2]=i-5; O[3]=i-8;  O[4]=i-11; O[5]=i-13; O[6]=i-15;O[7]=i-20; 
  O[8]=i-25;O[9]=i-30;O[10]=i-35;O[11]=i-40;O[12]=i-45;O[13]=i-50;

  ArrayInitialize(O,0);ArrayInitialize(O,1); //...ecc

}

for(Y=13; Y>=1; Y--){
                       
   if(Time[O[Y]] <= Time[Max]) 
                          
     K=O[Y];
     ..........}

[Drazen Penic]

You got it wrong.

Array O[13] has elements with indices 0 to 12. 

//Global scope
int O[13];    //Array for Index
int Y; int K; //Variable

// My code....
if(....){
  //Variables with Array for loop Y
  O[0]=i-3; O[1]=i-5; O[2]=i-8;  O[3]=i-11; O[4]=i-13; O[5]=i-15;O[6]=i-20; 
  O[7]=i-25;O[8]=i-30;O[9]=i-35;O[10]=i-40;O[11]=i-45;O[12]=i-50;  // Note changed indices here

  // No need for this --> ArrayInitialize(O,0);ArrayInitialize(O,1); //...ecc

}

for(Y=12; Y>=0; Y--){
                       
   if(Time[O[Y]] <= Time[Max]) 
                          
     K=O[Y];
     ..........}

You should read array basics in the MQL4 documentation. 

[fly7680]

Ok I understand now, so please confirm that Array in Array Time is correct?

if(Time[O[Y]] <= Time[Max]) 

[Drazen Penic]

fly7680:

Ok I understand now, so please confirm that Array in Array Time is correct?

O[Y] is an integer value, and it can be used as an array index, so it will work providing that you have enough values in the Time[] array.

As I see in your code, you are looking up to 50 bars back, so you must be sure that you have more than 50 bars on the chart.

[fly7680]

Perfect thanks to the help!