X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?a=blobdiff_plain;f=yarrg%2Fweb%2Fdocs;h=02cbeebdc90ba63569582c2fbd3bd21fa90ae9e2;hb=219c9b471fb927f2263b0e36669188ca937d5c8b;hp=24d9f165817fe95de8333067fb1027ac35d9bbfa;hpb=03d941b69511108bea1a2a20486f36e55c94d848;p=ypp-sc-tools.db-test.git diff --git a/yarrg/web/docs b/yarrg/web/docs index 24d9f16..02cbeeb 100755 --- a/yarrg/web/docs +++ b/yarrg/web/docs @@ -33,17 +33,21 @@ %doc> -
+
If you specify only one island or one archipelago, the site shows only arbitrage trades. If you want single-hop trades within an @@ -101,7 +105,7 @@ 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. -
-Formally, the capacity is a list of terms, all but the first preceded -by one of -, minus, +, -plus. Each term may specify a mass and/or a volume -(separated by a space), as a number followed (without an intervening -space) by a unit (t, kg, kl or -l). The first term may be a ship name or abbrevation -instead. If the first term specifies only one of mass or volume, all -the subsequent terms may only adjust that same value. +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-abbreviation +-
-Trades whose margin is less than the expected loss are never selected. -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. +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 0.1% and 1% per league. -0.1% would correspond, for example, to losing one fight to brigands -every ten 10-league voyages. +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 1/200 is the same as 0.5%; in each +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! + +