Downloading Historical Daily Data
When you specifically download Historical Daily chart data for a symbol or open a Historical chart, then Daily data (Open, High, Low, Close, Volume, and OpenInterest for a day) is downloaded for the symbol or symbols. Depending upon how the historical data download was started, you can specify the starting date to download, or the data that is missing from the file will be downloaded, or if the data file is completely empty, up to 50 years of data will be downloaded, if available.
Before Historical Daily chart data is downloaded, be sure to follow the instructions on the Getting Started documentation page to setup Sierra Chart to use a supported Data or Trading service, if you have not already done so.
A Historical Daily data download will happen automatically for a symbol when you open a Historical chart for that symbol, unless a download already has been done for the symbol within the last 24 hours during the time Sierra Chart has been running. A Historical Daily data download will be done at least every 24 hours for the symbol after the first download. A Historical Daily data download will be done when a new bar is added to the Historical chart from a new trading day.
- To download Historical Daily data for the active Historical chart, select Edit >> Download Data - Historical Chart on the menu.
- To download Historical Daily data for all Historical charts you have currently open in all open Chartbooks, select Edit >> Download Data For All Historical Charts on the menu.
- A window will display that allows you to specify a Start Date. This start date is the first date that the downloaded data will start at. Data from that date to the present will be downloaded. Select either the From Last Date in Chart Files or Specified Date option. If you select Specified Date, then enter a date in the text box.
- Click OK to start the download.
- When downloading using a Specified Date , data from that date, if it exists from the server, in the chart data file for each symbol you are downloading data for, will be overwritten with new data up to the present. This is useful for correcting errors in back data, getting more historical data than already in the file, or filling in missing days.
The downloaded data is stored in a Text/CSV format. See the Text/CSV Data Format page.
Sierra Chart writes the received data to the chart data files exactly as it is received from the data service without modification.
If a file error is reported in the Window >> Show/Hide Message Log during a download, then this means that the specified file could not be read or written to. This may be because the file is in use by another application on your system, such as a text editor.
*Last modified Friday, 12th August, 2016.