❓ASK – Is it really useful, trading using stop-loss? | Proxies-free

That Froex is a high-risk investment, well, we should all know that.
Every forex website or applications, warn in advance that there is a high possibility of losing the money invested.
However Forex Apps such LIBERTEX use the stop-loss system. It is set in a percentage value. If the trading operation involves a loss exceeding the value set by the user, the negotiation will be closed, and the loss is limited to that value.
But this is just a preset limit and nothing more.
What are your opinions about the stop-loss system?