Indices: Follow the indices of the leading markets (e.g. Dow-Jones, NASDAQ; Nikkei; etc.). Compare them to the changes in the FOREX market, and to changes in particular currency pairs.
Economic indicators: Pay attentiona to the release of economic indicators (for example - the monthly unemployment rate in the USA), and tra to identify their impact on the market in general, and on specific currency pairs in particular.
Glossary: Don't hesitate to browse FOREX glossaries, which are offered free on many platforms. A given word may have different meaning as it relates to FOREX and to the terminology used by the FOREX market participants.