The profitability of your trade will depend on two things. One is the difference in interest rates on two currencies (Swap Interest) and second is the amount of your capital or borrowing power. This means that profits can be small is depend on the amount.
Hence, there’s always risked involved, they have the potential to be very risky.
This strategy is not time-consuming and very high profits are possible if you grab the right position opportunity.
You need to look at the fluctuations in interest rates over a long period of months or years. Ideally, you should trade a position that has a low, declining interest rate and get a currency that has a high, increasing rate.