Good morning Edu,
yes, this is another thing.
The Randomize backtest starting bar option in FSB shows that the EA is robust no matter when you will start trading with it. Because normally when a trader takes an EA he starts always a t a future moment using it, not during the becktested period.
Randomize indicator parameters is the strongest test for me. It performs variety of test using different parameters for your broker. For example, if you have the RSI period of 9, it will test it with 6,7,8,10,11,12.. You can set the options for the Monte Carlo from here: