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# :* Select '''Online''' to switch software to online mode and get access to data from data vendor servers.# :* Check '''Download missing historical data''' to download the missing historical data from a data provider; clear the checkbox to work only with real-time data and locally stored data (no historical backfill from data vendor).# :* Check '''Save real-time minute bars to the database''' to save real-time data. If a data vendor provides historical minute data, the feature is not enabled by default and real-time minute data is not saved in the database. # :* Select '''Offline''' to work only with historical data that is already saved in the database. No additional data will be requested from the data provider in this case.# :* To show the '''Data Server Mode''' tab on software startup, check the '''Show Data Server Mode dialog box on startup''' checkbox; clear the checkbox not to display the dialog box.
Data Server Mode settings affect the whole software (MultiCharts, Portfolio Trader and QuoteManager). This setting determines whether the software has access to real-time data from a data provider server or it is limited to use only the data that is already stored in the database.
<div style="background-color: #E3FBE5;">'''Note''': In order to switch between the modes or turn on/off the "Download missing historical data" box, all workspaces should be closed in all instances of MultiCharts, forward-testing and autotrading should be stopped in Portfolio Trader and QuoteManager should be exited, [[Forex_Board#Forex_Board_Service_Window|Forex Board service window]] should be dectivated and [[Pre-Scanning_and_Watchlist#Scanner_service_window|service Scanner]] should be cleared of all symbols (or also deactivated). </div>
To learn how this page affects data collected in MultiCharts, please read [[Collecting and Saving Data to MultiCharts Database|this article]].
