My EA doesn't load enough historical data.

[LossFunction]

My EA has to calculate daily bars as much as possible when it's launched.

However, as below message shows, strategy tester only loads just 1 year of total bars.

GBPUSD,Daily: history cache allocated for 4412 bars and contains 262 bars from 2004.01.01 00:00 to 2004.12.31 00:00

With this, CopyRates function can only copy the 262 bars instead of 4412.

This happens even after I changed start datetime of the backtesting. How can I solve this problem ?  

Thanks in advance.