Before you enter any market as a trader, you need to have some idea of how you will make decisions to execute your trades. You must know what information you will need to make the appropriate decision on entering or exiting a trade. Some people choose to look at the underlying fundamentals of the economy as well as a chart to determine the best time to execute the trade. Others use only technical analysis.
Whichever methodology you choose, be consistent and be sure your methodology is adaptive. Your system should keep up with the changing dynamics of a market.