These options affect how commodity values are displayed:

@option{--price-db FILE} sets the file that is used for recording
downloaded commodity prices.  It is always read on startup, to
determine historical prices.  Other settings can be placed in this
file manually, to prevent downloading quotes for a specific, for
example.  This is done by adding a line like the following:

@example
; Don't download quotes for the dollar, or timelog values
N $
N h
@end example

@option{--price-exp MINS} (@option{-L MINS}) sets the expected
freshness of price quotes, in minutes.  That is, if the last known
quote for any commodity is older than this value---and if
@option{--download} is being used---then the Internet will be
consulted again for a newer price.  Otherwise, the old price is still
considered to be fresh enough.

@option{--download} (@option{-Q}) causes quotes to be automagically
downloaded, as needed, by running a script named @command{getquote}
and expecting that script to return a value understood by ledger.  A
sample implementation of a @command{getquote} script, implemented in
Perl, is provided in the distribution.  Downloaded quote price are
then appended to the price database, usually specified using the
environment variable @env{LEDGER_PRICE_DB}.

There are several different ways that ledger can report the totals it
displays.  The most flexible way to adjust them is by using value
expressions, and the @option{-t} and @option{-T} options.  However,
there are also several ``default'' reports, which will satisfy most
users basic reporting needs:

@table @code
@item -O, --quantity
Reports commodity totals (this is the default)

@item -B, --basis
Reports the cost basis for all postings.

@item -V, --market
Reports the last known market value for all commodities.

@item -G --gain
Reports the net gain/loss for all commodities in the report that have
a price history.
@end table