Weekends are good times for working on EAs but all brokers are closed

AR78

No - that wont happen - demo servers take a feed from the live servers.
You'll just have to work on history data until Sunday night

FWIW

-BB-

I meant some brokers work 24 / 7 . but this is a very rare case. and non of them work with metatrader.

I think it's better to give up.

Thanks.