This is a callout marker. Like all ChartIQ markers, the object itself is managed by the chart, so when you scroll the chart the object moves with you. It is also destroyed automatically for you when the symbol is changed. This is an example of a complex marker which can contain html, video, images, css, and animations.
Indices are designed to be broad measures of performance of an asset class or a subset of that asset class. So that indices are widely adopted, the methodology used to create an index is often published to give stakeholders an understanding of how decisions governing index calculation are made.
The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications.