Honestly, I used to want to sell as soon as spot prices went up, and hold on stubbornly when contracts lost money.

In the end, I couldn't hold onto spot, and I got liquidated on contracts…
It was only later that I realized position management is a simple truth: don't treat the "next candlestick" as your paycheck.
The part you can sleep soundly about is your position; the part that keeps you awake is gambling.

I'm even more down-to-earth now: first, determine the worst-case scenario of how much I can lose (for example, enough to buy a hotpot meal), then work backwards to set position size and stop-loss.
Don't think about increasing your position to "get out of trouble."
As for those tags/tools on the chain, honestly, they've been criticized recently for being laggy and misleading.
I'm not sure how much to trust them either; I just treat them as references.
In the end, I still go back to: can I accept the consequences before I click confirm.
That's it for now.