With the same stop-loss level, why does one person lose only 1% while another loses 30%?
Holding multiple contracts with similar price movements in the same direction compounds risk, so you should also set a cap on your total position size.
Put simply, set your stop-loss first, then work backward from the loss you can afford to determine your position size. This way, the cost of each loss stays within a range you’ve calculated in advance.
$BTC is now 80367.6.