Backtesting and FTMO problem

Hi guys,

Why I do really well on backtesting and when I jump into the FTMO free trial I do bad?
Like I have a 60-70% Win rate and an average of 1:3 RR but on the FTMO free trial (Demo account so) I feel and do very different results.

Can someone help me?

Thank you

Hi, probably, your strategy is overfitted to historical data. Regards Greg