Although originally performed on ticker tape, the technique has since ... at a time when stock prices were communicated by telegraph. Tape readers examined the sizes and price of incoming buy ...

The word "ticker" originally referred to the devices that received signals via telegraph and telephone ... The physical ticker tape devices were replaced as technology developed, eventually ...

The telegraph produced an inked line on a paper strip like a ticker tape. By counting the dips in the line, you could reconstruct the digits and then look up the message in the dictionary.