99% of people basically don’t understand true position rolling!

If you’re still using “buy low and sell high” like that—you're never going to make real big money!
The ultimate core of position rolling is: profit compounding, not adding to the principal (i.e., principal-at-cost). This is also the root cause of 90% of people getting liquidated—after you’re in profit, you crazily add more principal, and a single pullback wipes everything out to zero.
The correct way to do it: use 5% of your initial position to test the waters (if you have 3000U, use 150U). After a 30% profit, only add positions using profits—you never touch the principal. Each time you add, it must not exceed 50% of your previous position to prevent profit retracement. After your account doubles, immediately withdraw the principal—your mindset stabilizes instantly.
The 3 deadly mistakes you must avoid: after making a profit, going all-in immediately—the market maker is just waiting for you to get overexcited and become the liquidity provider; adding to the position with floating profits but not using a stop-loss—one wave of reverse movement will lead to liquidation; getting greedy and holding overnight—3 a.m. is the golden time when big players smash the market; holding overnight is basically asking for death.
There are also 3 details that 90% of people ignore and then get liquidated: when profit hits 50%, place a 1% profit protection order to prevent profit retracement; at 3 a.m. you must close all positions to avoid the risk of a dump; when the exchange suddenly “cuts the internet cable,” you must be ready to hedge to avoid unexpected liquidation.