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== Data Server Mode ==
Data Server Mode settings affect the whole software (MultiCharts, Portfolio Backtester Trader and QuoteManager). This page 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.
# Select '''Online: load the locally stored data and connect to a real-time data feed''' to switch software to online mode and get access to data from data vendor servers.
# Select '''Download missing historical data''' to access historical data from a data provider server or it is limited to use only the data that is already stored in the database; clear the checkbox to work only with real-time data and locally stored data (no historical backfill from data vendor).
# Select '''Offline: Use only the locally stored data''' to work only with historical data that already saved in the database.
# To show the '''Data Server Mode''' tab on software startup, select the '''Show Data Server Mode dialog box on startup''' checkbox; clear the checkbox not to display the dialog box.
<div style="background-color: #E3FBE5;">'''Note''': In order to switch between the modes or turn on/off "Download missing historical data" box, all workspaces should be closed in all opened instances of MultiCharts, Portfolio Backtester Trader and QuoteManager should be closed, no [[Time and Sales]], [[Understanding Real-Time Market Scanner|Service Scanner]] or [[Dom|DOM]] window should be activated. </div>
To learn how this page affects data collected in MultiCharts, please read [[Collecting and Saving Data to MultiCharts Database|this article]].
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