Need help!MT5 CopyTicks return the first time of ticks not match the Chart`s

[Hardy5012]

The code like this

//--- Requesting the tick history since 1970.01.01 00:00.001 (parameter from=1 ms) 
      int received=CopyTicks(_Symbol,tick_array,COPY_TICKS_ALL,1,getticks); 

and in the tick_array the first time is "2019.10.21 08:58:05.309", but in the Chart have from 2018 to now quotation, why?