Timeliness of Data
StockCharts Support February 05, 2009
Free, Basic and Extra members will see charts that are based on data that is at least 15-minutes delayed. If price data from the BATS exchange is available, those members will see charts that include non-delayed data from the BATS exchange during the first 15- or 20-minutes. (More details)
ExtraRT and PRO members will see charts that are based on non-delayed data.
In all cases, it is possible that high-speed, dedicated data feeds may have data that is updated slightly ahead of the data on our charts because of the nature of the Internet.