The unscrupulous signal provider, who put in 500u for copying, seems to have a very high yield; it's been half a month and they've opened positions twice. No profit, no loss, but the principal has decreased significantly. Upon closer inspection, it seems my loss rate is 0. However, the actual principal keeps diminishing. This signal provider appears to be profitable, but most copy traders are losing. Every time a position is opened, the leverage is extremely high, and the take-profit and stop-loss ranges are very small, causing each position to automatically take profit or stop loss within minutes. When it profits, more than half of the gains go to the profit fee, and when it drops, both the fee and principal are completely lost. (This is why this beast has a return rate of 7% over 38 days, while copy traders have lost more than 20000u).