It takes 3 working days from the date you change your risk level, to the day your funds are invested in the new level.
Changing your risk level option involves selling the funds that are invested in your previous risk level, and then using these sold funds to purchase funds in the new level. We have set it up so that a buy purchase will be kicked off in line with the sell immediately, to make sure that they both settle on the same day so that your money is not out of the market for long at all. π