To judge whether a trading system is robust, consider a few points: does it make a profit within three trades? After closing, will it never sell at a loss? Can it capture an entire wave of trends? Is the price difference between opening and closing trades ideal? Anyone who asks you to add to your position is simply foolish; you will lose everything. The difference is only that some people have good luck and can hold on a bit longer, while others have bad luck and can only hold on for a shorter time; in the end, the result of holding a position is always zero.