During normal trading Glint does not add a margin to its wholesale market rate, which is published in the Glint App. A 0.5% Glint fee is added separately before you submit to any trade. If you submit a trade it is not reversable and it is always you choice whether you buy.
When Market rates are unavailable (e.g. on weekends) Glint will still allow its clients to trade but, add a margin of usually 0.5% to its rate to mitigate risk. Where there are abnormal market conditions Glint reserve the right to add a margin to manage its market risk and where possible still allow clients to trade.