create one EA to writes the Ticks-data, but always reports array out of range when debugging， thank you for your help！

[Blur Darkness]

The following code is relatively simple, but in the mt5 Testing Visualization linear array out of range an error message.

I'm a novices, and I had searched for a long time and have not found the reason for the error, but I think it might be caused by the caching problem in the OnTick() function.

Please give guidance from experts, thank you!

#property copyright "Copyright 2021, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

MqlTick myticks[];
double tick_bid[];
double tick_ask[];

int OnInit()
  {

   return(INIT_SUCCEEDED);
  }

void OnDeinit(const int reason)
  {

   
  }

void OnTick()
  {
         ArraySetAsSeries(myticks,true);  
         CopyTicks("XAUUSD",myticks,COPY_TICKS_INFO,0,50);   
                 

         ArrayInitialize(tick_bid,0);
         ArrayInitialize(tick_ask,0);
         ArrayResize(tick_bid,50);
         ArrayResize(tick_ask,50); 
  
         for(int i=0;i<50;i++)  
         {  
         
            tick_bid[i]=myticks[i].bid;
            tick_ask[i]=myticks[i].ask;
   
         }


}

[Vladimir Karputov]

kakaprince:

The following code is relatively simple, but in the mt5 Testing Visualization linear array out of range an error message.

I'm a novices, and I had searched for a long time and have not found the reason for the error, but I think it might be caused by the caching problem in the OnTick() function.

Please give guidance from experts, thank you!

***

Please insert the code correctly: when editing a message, press the button   and paste your code into the pop-up window

[Blur Darkness]

Vladimir Karputov #:

Please insert the code correctly: when editing a message, press the button   and paste your code into the pop-up window

OK，thank you for your kindness ：）

[Khuman Bakhramirad]

#property copyright "Copyright 2021, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

MqlTick myticks[];
double tick_bid[];
double tick_ask[];

int OnInit()
  {

   return(INIT_SUCCEEDED);
  }

void OnDeinit(const int reason)
  {

   
  }

void OnTick()
  {
         ArraySetAsSeries(myticks,true);  
         ArrayResize(myticks,50);
         CopyTicks("XAUUSD",myticks,COPY_TICKS_INFO,0,50);   
                 

         ArrayInitialize(tick_bid,0);
         ArrayInitialize(tick_ask,0);
         ArrayResize(tick_bid,50);
         ArrayResize(tick_ask,50); 
  
         for(int i=0;i<50;i++)  
         {  
         
            tick_bid[i]=myticks[i].bid;
            tick_ask[i]=myticks[i].ask;
   
         }


}

you have to resize the myticks list too

[Blur Darkness]

Khuman Bakhramirad # :

you have to resize the myticks list too

Thank you!

I had try it,But at runtime, the previous error will still appear。

[Khuman Bakhramirad]

kakaprince #:

Thank you!

I had try it,But at runtime, the previous error will still appear。

copy the code i write for you and compile it and it will be ok i did test it 

[Mr Anucha Maneeyotin]

Blur Darkness:

The following code is relatively simple, but in the mt5 Testing Visualization linear array out of range an error message.

I'm a novices, and I had searched for a long time and have not found the reason for the error, but I think it might be caused by the caching problem in the OnTick() function.

Please give guidance from experts, thank you!

Please try this code

CopyTicks(_Symbol,tick,COPY_TICKS_INFO,0,iBars(_Symbol,PERIOD_CURRENT));