There's no such thing as the best stop-loss, only the most suitable one.

People with a personality that can withstand large fluctuations and prefer big trends are suited for large stop-losses; those who seek stable rhythm and don't want big ups and downs are better off with small stop-losses.
This is one of the most perplexing issues for many contract traders. In fact, there is no absolute standard—only what fits you best.
The advantage of a large stop-loss is a bigger margin for error, allowing you to withstand normal market shakeouts and fluctuations, making it easier to capture the full trend. But the drawbacks are also obvious: if you misjudge the direction, a single trade can result in significant losses, causing psychological pressure and potentially affecting subsequent operations.
Small stop-losses are the opposite; each loss is limited, keeping the mindset relaxed. Even if you make a mistake, you can quickly cut losses and try again. But the biggest problem is being frequently stopped out by the market, only for the trend to resume immediately after, disrupting the rhythm, increasing frustration, and gradually eroding the capital.
Many people fantasize about using small stop-losses to chase big profits, thinking the risk is low and the reward high, but in reality, they often face continuous stop-outs, slowly losing their capital, and their mindset collapses first.