A pre-calculated item is a value associated with a symbol and it is calculated when storing data in one of your databases. For example, when saving intraday data, a pre-calculated item named "Last Price" is created and it is associated with the last price of each security. In watchlists, you can display the value of a pre-calculated item for each symbol by right clicking on the watchlist grid, selecting "Value" then "Quotes" and finally the Pre-Calculated item you want to display.
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