why do i need to download history data each time i did the back test
younis.hadidi:
when I am going to do a back testing for an ea on a currency pair , I do a downloading for the history data , if I tried to do some other back testing later , I will find no historical data ,
I need to know what's going on why I should download history frequently and how to solve this problem ?
When I am using ticks based on real ticks, whole month history is downloaded in the first run. Further runs check for synchronization (perhaps CRC), and does not download any further ticks. If I change the strategy tester to run OHLC, there is also no need for new data download. If you change the simulation period into a different month, further data is downloaded.
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when I am going to do a back testing for an ea on a currency pair , I do a downloading for the history data , if I tried to do some other back testing later , I will find no historical data ,
I need to know what's going on why I should download history frequently and how to solve this problem ?