The Market prices database is the main output from YARRG. It offers a variety of enquiry options.

Hopefully you will be able to work it without too much help, but this documentation page contains information about the database website which you may not be able to divine from the online user interface.

(An exception to this is if you select the `Update' option from the `Trades for route' lookup; the list of (de)selected stalls is too long to fit in a URL.)

If you specify only one island or one archipelago, the site shows only arbitrage trades. If you want single-hop trades within an archipelago, you must enter the archipelago name twice.

After getting the results, you can untick various trades individually, and select `Update' to get a new plan. The unticked trades will be excluded from the voyage plan (if any) and also from the totals.

So you should specify your vessel capacity. You can enter things like:

- sloop
- The capacity of a sloop, leaving no allowance for rum and shot
- wb - 1%
- The capacity of a war brig minus 1%
- 13t 20kl
- 13 tonnes (13,000kg), 20 kilolitres (20,000l)
- sloop - 10 small 40 rum
- The capacity of a sloop which remains after 10 small shot and 40 rum are loaded
- 2t plus 500kg minus 200kg
- 2300kg, with no limit on volume

More formally:

capacity-string := [ first-term term* ] term := ('+' | '-' | 'plus' | 'minus') (value+ | number'%') value := mass | volume | integer commodity-name-or-abbreviation mass := number ('t' | 'kg') volume := number ('kl' | 'l') first-term := mass | volume | mass volume | volume mass | ship-name-or-abbreviationIf the first term specifies only one of mass or volume, all the subsequent terms may only adjust that same value.

We model this by pretending that you expect to lose a fixed proportion of your stock each league you sail. This expected loss does not appear in the trade tables (although the distance does), but it does affect the way the voyage trading plan optimiser chooses which trades to do.

Trades whose margin is less than the expected loss are never included in the suggested plan. For example, if you select 1% loss per league, and plan a voyage of 5 leagues, then any trade with a margin of less than 5.15% would be completely excluded (5.15% not 5% because the loss works like compound interest). Theoretically very profitable trades which are close to the expected break-even point because of the distance can also be rejected by the optimiser in favour of shorter distance trades with theoretically smaller margins, if it's not possible to do both.

As a guide: you may expect to lose between 0.01% and 1% per league. For example 0.1% would correspond to losing one fight to brigands (who take 10% if they win) for every 100 leagues sailed.

You can enter the value in the box either as a percentage, or as a
fraction 1/*divisor*, eg 1/2000 is the same as 0.05%; in each
case it is taken as the loss for each league of the voyage.

The trading plan does not take into account accumulated profits from each leg of the journey when applying the available capital constraint. For example, if you specify a journey from A to B to C and a capital limit of 10000 PoE, the trading plan will not tell you to buy 1000 peas at A for 10 PoE each, sail them to B and sell all of them for 20 PoE each, and then buy 2000 beans at B for 10 PoE each and sail them to C to sell for 20 PoE each even if such a trade would in fact be possible. In practice this is unlikely to be a problem! <& footer &>