I've seen it written as both "cashback" and "cash back," but I think it really depends on the context. Generally, "cashback" is used as one word when talking about a rewards feature, while "cash back" as two words refers to getting money back at a store or from a purchase. Speaking of financial terms, if you’re interested in trading platforms, I’ve had some experience with one that could be useful. You might want to check out Iq Option reviews—I found it to be a pretty solid choice for trading, especially if you're into options and forex.