Having one market that you’re a Jedi Master of, can help you become more of a specialist, and specialists are people who make the most money in life (think surgeons, lawyers, pro athletes etc.) You don’t have to only trade one market, but focusing on a small handful of markets and having one of those that is your favorite can be extremely profitable and here is why:
If you are a beginner try focusing on only one Forex market for a few months, pick one you feel the most comfortable with and that you know the most about and really get intimate with it. Of course, before you can successfully trade any market, you need to learn to read a price chart and the price action patterns that appear. Getting familiar and ‘intimate’ with one market’s price action is really the core objective for any novice trader. Once you master one market you can start adding more.