We must have an accurate strategy even before we start trading, and in each individual transaction we need to understand what we are doing, when we should enter the trade, and at what levels we should exit the trade if the market behaves differently as we expected.
The main point is to minimize our risks, to reduce losses to a minimum, because there will always be losses, this is an inevitable part of trading, every trader will incur losses, but our main task is to minimize our losses.
You mean a more self-developed strategy that the trader has developed? because even a trading strategy is very accurate, it doesn't absolutely eliminate losses.
The stop-loss strategy was yet derived by someone before it was even added to some of those trading platforms for automatic use. Let's say, for example, that you bought a coin for $500 and your expected profit is $200 (total of $700), but after the price of the coin goes up a little and your profit becomes $180 instead of the expected profit, your profit begins to go down again because the price of the coin keeps falling. Instead of allowing the already-seen profit to melt away, you can just decide to stop the trade. Sometimes the strategy manages to help one earn profit, but not always because the volatility can occur so quickly.
Yes I think brokers do have a setting for their trade endpoints but how will one know if it not even mentioned by the broker or can we say it's a way for them to generate more profit as a company .I even heard some brokers fold up after covid with millions.
I cannot really tell about that because I am not sure and haven't heard that those settings can be monitored and altered by those brokers. I know that sometimes some brokers can just add some features to entice users, making them think they can have more success, while it's just a trap that can even cause more losses.