The market is always right
The forex market is like a huge ocean and your tiny positions are only a drop of water in comparison, and the market exchange rate shows where buyers and sellers are currently willing to meet. Stubbornly thinking that you are right on a trade when the entire forex market is clearly telling you otherwise is a recipe for disaster as a forex trader. Basically, you need to avoid thinking that you are right about an underwater trade and the market is wrong since it is not you but the market that ultimately determines the profitability of your forex trades and at what exchange rate you can unwind them.