Prices

AlertDesk shows each position's latest price, its unrealized P/L, a price chart on each ticker's page, and how your closes have worked out since. Prices are fetched by your computer, for your own personal use.

Steps

Choose the source in Settings → Prices: Yahoo Finance (free, for personal use) is the default. Or choose None: everything else works, and prices say "no prices".
The market keeps New York time, and so does AlertDesk for everything about trading -- the day a price is "as of", days to expiry, what's still in force -- wherever your computer is; times it shows you (kept, checked, backed up) are your own. When your clock isn't on New York time, a market date says "(New York)".
Prices are fetched only for what needs them: your open positions (paper too), the paid services' recs still in force, and options you closed, until their last trading day. A stock or fund you've sold isn't fetched again.
A mutual fund is a position like shares, marked fund, priced at its daily NAV — which the fund posts in the evening: until 7 PM New York time it shows the day before's, "as of" that day. A money-market or sweep fund (the one your broker keeps your cash in) is your account's cash, not a position.
Option prices are saved each evening, shortly after the market closes (4:05 PM New York time, 1:05 PM on a half day), for every contract you hold (paper too), every contract a paid alert names, and every contract you closed, until its last day (Exit Timing measures your close against it).
Leave AlertDesk open in the evening. Yahoo keeps no history for options: if the computer is off that evening and isn't opened before the next morning's market open, that day has no price for options. AlertDesk says "no price — not scored" for it; it never guesses.
An option that expired is valued from the underlying stock's close on expiry day: "expired · worthless" or "expired · worth $X". A paper option settles on its own at expiry.

What you should see

On Positions: a Price and an Unrealized P/L for each position, with the day and the source under the price.
On a ticker's page: its daily closes with A (a service's alert), B (your buy) and C (your close).
On Exit Timing: each close against the service's exit or the contract's last day; a close still waiting for that day shows its reading so far.

If it doesn't work

"No price yet for ABCDX, WXYZ" (Health and Here's what's going on): those instruments got no price this time, said why in plain words; every other price was updated. The price source's own message is in Copy diagnostics on Health.
Health says "Prices not updated since …": no price at all could be fetched (the computer was off or offline, or Yahoo didn't answer). AlertDesk tries again on its own; nothing wrong is shown meanwhile.
A position says "no price": nothing has been saved for it yet (a new ticker gets its first prices the next evening), or the source didn't list it.
Yahoo changes things now and then and the free source can stop working for a while. Choose None in Settings → Prices to switch prices off until it's fixed.