The exchange of the fiat currency takes place on the floor of the forex market. The same is replicated electronically on an exchange platform. On this platform, you will be able to use all the tools that you actually needed to make the buying and selling of the currency a lot for simple to handle . We have seen people that matters in the forex market or the bellwether , they would tell you that their is a never going to loose strategy and you will always win whenever you make use of this strategy. Well, i would say that it is not possible not to lose trade in forex once in a while. That's the reason why the experts sweat profusely, with their eye turning red whenever they leave the Trading ground. This indicated that market didn't go in their favour.
On the other hand, I will disagree with you on the ground that , giving signal is a scam. That's a fallacy in the Trading space. I do have a friend who is better than I do in technical analysis, we both do analysis of the market using pure price action and we help each other by exchanging signals.