You can hold positions over the weekend with Simplex, Duplex, and Triplex accounts and Duplex/Triplex Bonus accounts, but only allowed during the challenge phases, but not in the Funded stage.
In Instant Plan Weekend holding is not allowed.

Hexa Prop permits holding positions over the weekend, but it’s important to consider the associated risks:

Formation of Gaps

Stock exchanges are closed on Saturday and Sunday, so there are no quotes and no trading. However, during these two days, there may be events occuring that could trigger strong reactions on the markets. In such cases, there could be a significant gap at the start of trading on Monday.

If you are lucky, this move will be in the direction of your position, but if not, it could even take the balance over the stop-loss level and into a significant negative floating loss. If such a loss exceeds the allowed, daily loss limit, the system will deactivate the account. Hexa Prop is not able to pay out profits resulting from extreme gaps occurring over the weekend.