There is a lot of knowledge about breaking the position, which can be divided into true breakthrough and false breakthrough. To tell the truth, I know, but I can only tell you that the breakthrough is related to price, time and space. As for the white line you mentioned, it is sometimes mixed with the yin-yang line. I think it should be the cross line in the yin-yang line. When the opening price and closing price of the K-line are at the same price or the difference is very small, a cross star will appear. Cross stars cannot be used alone. In different price positions, it represents different meanings, and the length of the upper and lower shadow lines of the cross star is also very important. There are also some little-known things, such as whether to close the shadow line first or to close the shadow line first, which are also very particular and represent completely different meanings. I suggest you read more books, or even if others can answer your questions, you won't understand them, just like college students telling elementary school students advanced mathematics, which is a gobbledygook for you. Forgive me for talking too much.