If the market is closed you cannot open, close or modify any order - any broker, demo or live is same thing
Some trading platforms is allow to do this n o MT4.
You can always delete it (right click on pending order).
Once the market opens on Sunday.
Once the market opens on
Please use proper English in your posts.
There are a lot of people here that are not native English speakers and posts such as yours are not easy
for them to read and translation tools may not translate properly.