This screener lists stocks that currently match TSI(25,13) Trending Down Last 13 Days, one of the True Strength Index screens. The True Strength Index (TSI) is a technical indicator that measures the strength and momentum of an asset's price movements. It was developed by William Blau and was first introduced in 1991. The list is updated daily: open a chart for any ticker, or customize the screen, set an alert and backtest it as a trading strategy.