If your order is executed, you will be notified immediately afterwards by email and in your transaction log. Your holdings will update in your portfolio.
The cash on the holdings settles on the same day (for purchases) and you will receive your cash on sales day two trading days later (the U.S. is T+2).
On Stake, you can only buy shares with settled funds. We will show you your funds available to trade and your funds due to settle from any sales you have made in the past 3 trading days.
The reason for this is to prevent a customer from trading on unsettled funds and violating U.S. Trading rules. In the future we might make trading on unsettled funds available on a subscription model.