You use tehnical analysis to trade but the currency markets are driven by major fundamental announcements. Therefore, it is important to know exactly when these announcements will be made so you can take advantage of the big moves that follow or avoid losing through a sudden surprise reaction. Sometimes consolidation takes place before a major fundamental announcement and you can benefit from a straddle trade. Economic calendars show in advance what time the economic data release will take place. If traders are expecting an interest rate to rise and it does, there usually will not be much of a movement because the information will already have been discounted by the market. However, if the interest rate does not rise as expected, then the market may react violently.
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