// Simple Trading Script v0.05 (c) 2012 NeatPortal.com
// WARNING: Requires version 2718+ to work properly
//
// The script tries to gain more resources by using spread between bid and ask prices
// Algorithm is simplified, but should work reasonably well
// Uncomment to enable auto start
//label autorun
// Extra resources to reserve (in addition to city's reserved resources)
//        food, wood, stone, iron, gold:
extra = [  10m,   2m,    5m,   2m,    0 ]
// How aggressive we want to be (lower number would increase trading gains at the cost of potentially slower trade execution), from 0 to 0.49
aggr = 0.05
// === nothing to configure below this line ===
config trade:0
res = 0
comm = 0.005
maxBatch = 9999999
maxRes = 990B
label nextres
if !m_context.marketReady() goto nextres
resName = ResourceIntNames[res]
if city.resource[resName].amount > maxRes goto tryother
reserved = city.reservedResource
resGold = max(reserved.gold + extra[4], (city.resource.gold + reserved.gold + extra[4]) / 2)
buyVolume = 0
label trading
if city.tradesArray.length > 8 execute "canceltrade " + city.tradesArray[0].id
if city.tradesArray.length > 8 goto trading
prices = [ Price(res, aggr), Price(res, 1 - aggr), Price(res, aggr) * (1 + comm), Price(res, 1 - aggr) * comm ]
if prices[1] / prices[0] < 1.01 goto trynext
sellVolume = floor(min(city.resource[resName].amount - reserved[resName] - extra[res], (city.resource.gold - resGold) / prices[3], 1.1 * maxBatch - buyVolume / 10))
if sellVolume <= 0 sellVolume = max(0, floor(min(1, city.resource[resName].amount - reserved[resName] - extra[res], (city.resource.gold - 1) / prices[3], 1.1 * maxBatch - buyVolume / 10)))
if sellVolume > 0 execute "sell " + res + " " + min(sellVolume, maxBatch) + " " + prices[1]
buyVolume = max(0, floor((city.resource.gold - resGold) / prices[2]))
if buyVolume > 0 execute "buy " + res + " " + min(buyVolume, maxBatch) + " " + prices[0]
if city.tradesArray.length < 8 if buyVolume + sellVolume > 0 goto trading
label tryother
sleep 10
label trynext
res = (res + 1) MOD 4
goto nextres

ScriptExamples