I have an algo working good on EURUSD (30/15mins) and AUDUSD (30/15mins) with same variables. All equity curve looks very similar so I was confident on that to put them on live. But the result after 3 months was AUDUSD in profit is expected but EURUSD is completely opposite!! :(((

Have no time to check why is it.

My first guess is 100k bar is not enough to tell this system always generate the consistent equity curve.

2nd is unusual volatility due to major breakout.