I know "CopyTick Function" do copy ask data &... in array. but this way have a problem
How I can copy ask data from 10 month ago until today in to an array?
For test when I use "comment function" & "MqlTick structure" & disconnect the internet & run strategy tester I can show ask data tick by tick on chart. so this data exist on my hard drive.
No, ticks are not saved on your hard drive. Strategy Tester ticks are calculated history data, which is only OHLC prices.