Technical Indicators and Overlays Technical Indicators and Overlays are the often squiggly lines found above, below and on-top-of the price information on a technical chart. This section describes the various kinds of technical indicators and overlays that are available here at StockCharts.com. Introduction to Technical Indicators and Oscillators - An in-depth introduction to the various kind of technical indicators and oscillators out there. A "must read" article for StockCharts.com users. Introduction to Market Indicators - An in-depth...