Cycle bar - the progress of a running business moves smoothly instead of jumping once a second, and a business that finishes a cycle faster than every two seconds simply says running

Computer buyers - they keep a stock of their own and pay by how full it is, so keep flooding one good and its price sinks, leave one alone and it climbs again

City population - a well supplied city draws people in and its demand grows with it, a neglected one slowly loses inhabitants

Time of day - food and consumer goods sell a little better in the evening, building materials during the day, about 15 per cent either way

Events ahead - a drought, a trade fair, roadworks or a rail strike is announced with a countdown and only takes effect when it runs out, so you can still act on it. Flooding is the one that still hits without warning

Events more often - twice as many of them now. One an hour for the whole world meant most of you never saw one, and they are worth seeing now that they come with a warning

Rival prices - they price against the exchange now instead of always against the base price, so forty firms stop flattening every move in the market

Buyer stock - open a good in the Exchange and you can see what the computer buyers pay and how full their store is, so you know whether their price is on the way up or down

Market chapters - Buy and sell goods and Cash, loans and markets explain sectors, city taste, city growth and how the computer buyers' stock works