Each trader’s thoughts and opinions, which are expressed through whatever position they take, help form the overall sentiment of the market regardless of what information is out there. The problem is that as retail traders, no matter how strongly you feel about a certain trade, you can’t move the forex markets in your favor. Even if you truly believe that the dollar is going to go up, but everyone else is bearish on it, there’s nothing much you can do about it (unless you’re one of the GSs – George Soros or Goldman Sachs!).
As a trader, you have to take all this into consideration. You need to perform sentiment analysis. It’s up to you to gauge how the market is feeling, whether it is bullish or bearish. Then you have to decide how you want to incorporate your perception of market sentiment into your trading strategy.