The first of the two methods is that the price runs in the middle and upper rails, which I think is an upward trend, and the price runs in the middle and lower rails, which I think is a downward trend. If the middle rail moves laterally, I think it is a consolidation trend.
The other narrow rail is used to screen the consolidation trend. The price runs above the upper rail, the long trend price runs below the lower rail and the short trend, and the consolidation trend runs between the upper and lower rails.