Machine generated contents note: pt. I Heuristics -- 1.Does foreign exchange economics `perform' the currency markets? -- 2.The structures and cultures of currency markets -- 3.Experts in currency markets -- pt. II Observing markets -- 4.On the floor -- 5.How do market visions emerge? Analysts' screen practices -- 6.The ambiguities of fundamental analysis -- pt. III Forecasting markets -- 7.From model to market: the organization of forecasting -- 8.Changing cultures of expertise -- 9.When to change one's view? Managing market commitments.