+ +The Market prices database is the main output +from YARRG. It offers a variety of enquiry options.
-The system has two main parts: this website which maintains a -searchable database of commodity prices, and an upload client, which -screenscrapes the commodity data from the Puzzle Pirates game client -and uploads it to the database. +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. -
-The lookup page gives access to the uploaded data. +If this page is all too complicated for you, you may prefer to read +the introduction instead. -
-The current official version of YARRG for use as an upload -client can browsed here: - http://www.chiark.greenend.org.uk/~ijackson/ypp-sc-tools/master/ -See particularly the -YARRG README. +(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. + +
-To install the client, install the `git' version control system -and the other dependencies listed in the `Installation requirements' -section of the README and then run: -
-git-clone http://www.chiark.greenend.org.uk/~ijackson/ypp-sc-tools/master/.git ypp-sc-tools -cd ypp-sc-tools -cd yarrg -make --this will download the code into the directory
ypp-sc-tools,
-and build the software.
+
+So you should specify your vessel capacity. You can enter things
+like:
+-When new versions of the upload client are released, you can: +More formally:
-cd .../ypp-sc-tools
-git-pull
-cd yarrg
-make
+ 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-abbreviation
-to fetch the new version.
--
-YARRG is Free Software - you may share and modify it. See the -licences for details. +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.
-Not only the client but also the webserver code is Free. The website
-code can be found in the same tree as above, in the web
-directory.
+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.
-But in case we have made changes but not yet pushed them -(perhaps because we haven't done a release), and to make it easy for -anyone else who runs a copy of the website to provide everyone with -the source for their version, the website code itself lets you download -an up-to-date tarball of its -actually-running source code. +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 "minimum trade value" specifies a minimum profit that you would +like to get from each (commodity, collect island, deliver island) +triplet. Trades which don't meet this minimum will start out unticked in +the "Relevant trades" table and will not be included in the voyage +trading plan. + +
+ +If you want to change your threshold, you have to select "Apply", +which will automatically tick and untick all of the tickboxes for in +"Relevant trades", as appropriate. This will undo any customisation +of the set of trades you have already done by manually ticking and +unticking individual trades. + +
+ +The value is an absolute poe amount, typically 5 or 10, representing +the minimum profit to make it worthwhile (from a time and effort point +of view) clicking in the YPP client to collect and deliver a +commodity. Setting a higher threshold will make each island visit +faster, by excluding trivial transactions, and so reduce the chance +that market conditions change adversely during your voyage. + +
+ +Goods planned to be bought at the stall (which might boost the stall's +poe reserves) are not considered, to avoid having to calculate the +stall's cash reserves at various different times. + +
+ +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! + +
+ +Then, if applicable, follows a number from 0 to +9 indicating roughly where the commodity is in the +list of commodities of the same class. The number indicates which +tenth of the list is: 0 for the first (top) tenth, +1 for the 2nd, and so on, up to 9 +for the final tenth. + +
+For example, +
++indicates that Fine pink cloth can be found under Cloth, +between 20% and 30% of the way down through the types of Cloth. +If you mouseover that in a suitably equipped browser you should see the +text: ++
+ Fine pink cloth +
+Fine pink cloth is under Cloth, commodity 14 of 55 +
-If you would like to run a (perhaps modified) copy of the YARRG -website it would be very easy for us to make our system send you -copies of updates submitted by users of the official YARRG client, in -the format expected by the code you'll be running. Please just ask -us. +The position indicator digit isn't shown for very small +categories. -