Hello Facundo,
Yes, maybe it is not a bad idea to test a different broker and see how it goes there. But you definitely need to look for a match between the backtest and actual trading, no matter on Demo or Live account.
My question about the Reactor is: Do you use the Monte Carlo in the Reactor or just after testing on Demo?
I would suggest you increase the min count of trades to 500.
If you use MetaTrader-Demo, this is the data from JFD Demo server, so you better use it, rather then testing with the broker you have at the moment.
Kind regards,
Petko A