Presentation of the Investor/RT automated backfill mode
Investor/RT automated backfill mode has 2 purposes
- at startup, it is designed to backfill historical data since the date/time that the data feed was last stopped.
- It is also designed to fill in any historical data per symbol (tagged for intraday monitoring) for all trading that has occurred since the last trade recorded in the local database.
The backfill automation does what is necessary to ensure that all intra-day symbols historical data will be complete and up-to-date each time you start the program and connect to your data source.
It also takes into account your data retention settings. For example, a symbol setup to retain, say, 30 days of intra-day data may be charted using a chart setup that calls for say 100 days of data. Investor/RT will recognize situations like this and automatically download the extra data needed to fill the chart request and automatically adjust the setup of the symbol to retain that newly downloaded data.
Note : in the event that a chart calls for a static begin date/time, data is downloaded back to that begin date and the symbol is automatically setup to "Retain All 1-Min Data".
Opting out of the backfill automation mode
Some users, such as those tracking many hundreds of intra-day symbols, may wish to opt out of the automated backfill mode to exert more control over when data is downloaded.
This can be achieved by setting the configuration variable BackfillAutomation to false.
Doing so will enable Charts > Backfill preference window to appear and allow the user control on whether to auto backfill or not (whenever I/RT starts), and whether to auto backfill all intra-day symbols or just those open in charts (as it was the improved backfill automation mode was introduced in I/RT 11.2)
