--- If you COPY someone else's transaction, YOU MUST...
0. You have to believe they are better than you. Otherwise, copying is meaningless.
1. Carefully check their results for a total of 90 days. It should be a steadily rising chart with moderate fluctuations instead of skyrocketing spikes.
2. Once you have chosen, you must absolutely trust them for a long enough period of time (30-90 days). DO NOT BE HOT. When counting many of the top traders, I see that most of them have positive ROI (>200%) within a 90-day frame, but the PnL of some followers is negative. Why? According to my prediction, some followers saw a negative order and immediately got scared, intervened in the order, TP and SL were mixed up and did not follow the leader, leading to a negative order. That's why the first item number 0 I mentioned is so important. You must believe they are better than you, and not interfere with orders.
3. You cannot give all your money to 1 person. You can spend 30% to copy from a few others, the rest you trade yourself. Or take 100% and spread it evenly over many people (if you don't have time)
4. Start small - so you have time to understand the trading style of the person you're copying. Once you trust them, add a little more capital to them, but not too much, have to diversify sources.
Opinion: Copy trading is also very good, because others will dare to do what we do not dare to do. They dare to try x10 accounts, while we prefer safe trading. Giving them 5-10% of your budget and being willing to x10 or lose it all is worth it, right?