0–100, mostly how each is changing against the company’s own history, not its level
Net shares bought over the last 20 trading days
Each point is the net buy over the previous 20 trading days
By investor
Each point adds up one investor group's shares bought minus shares sold over the previous 20 trading days. Above zero, the group bought more than it sold over that stretch; below zero, it sold more. Where a line crosses zero, that group switched sides. The axis is in millions of shares; multiply by the day's closing price for an approximate NT$ value.
When the three lines move the same way, the buying or selling is broad; when they split, the foreign line usually carries more weight. The window switch picks 5 days (a week), 20 days (about a month) or 60 days (about a quarter).
Each bar is one trading day, the three groups stacked: net buying above the zero line, net selling below. A single tall bar marks a day when one group bought or sold heavily; the rolling chart shows whether such days added up to a lasting shift. To keep the bars readable the chart shows about six months on a wide screen and three on a phone; pick 1M or 3M in the range control for a shorter stretch.
Net shares bought over the last 20 trading days
Each point is the net buy over the previous 20 trading days
By investor
Each point adds up one investor group's shares bought minus shares sold over the previous 20 trading days. Above zero, the group bought more than it sold over that stretch; below zero, it sold more. Where a line crosses zero, that group switched sides. The axis is in millions of shares; multiply by the day's closing price for an approximate NT$ value.
When the three lines move the same way, the buying or selling is broad; when they split, the foreign line usually carries more weight. The window switch picks 5 days (a week), 20 days (about a month) or 60 days (about a quarter).
Each bar is one trading day, the three groups stacked: net buying above the zero line, net selling below. A single tall bar marks a day when one group bought or sold heavily; the rolling chart shows whether such days added up to a lasting shift. To keep the bars readable the chart shows about six months on a wide screen and three on a phone; pick 1M or 3M in the range control for a shorter stretch.