Forex backtesting

Hi, This is a question on back testing Forex.

By base currency is AUD. When i take a trade in a currency other than AUD say GBPUSD, for calculating profit in analysis window, the conversion to AUD is done using the close rate for the entry date. (using norgate end of day data). Is there a way to make the profit calculation use open rate on the entry date?

My strategy is in trade from 1 day to 5 days with entry at the open price of opening bar. So if for calculating profit end of day price is used the impact is huge.

Please do let me know if my question is not clear and if you need added information

Regards