The present study investigates the relative importance of macro (interest rates, inflation, etc) and micro (order flows, information, etc) variables in determining the short-run exchange rate movements. Empirical analysis is based on a primary survey of the Indian foreign exchange dealers. It finds from a survey that a majority of the dealers feel short-term changes in the Indian rupee/US dollar market are basically influenced by the micro variables such as information flow, market movement, speculation, central bank intervention, etc. One of the findings of this study, which has policy implications, is that the dealers feel speculation would increase volatility, liquidity and efficiency in the market and, central bank intervention reduces volatility and market efficiency.