Trust your plan and trust your powers of judgment. Furthermore, keep this sense of confidence in yourself throughout the duration of your position in the market. Loosing confidence in yourself and your trading plan while holding a market position most often results in losses. If doubt is haunting you and you cannot control, it is best to simply offset your position and be clear of the market. Reversing or altering your trading plan in mid-trade is the last thing you should do.
The most important thing to remember about trading with confidence is this: No matter how diligent or thorough your research into a particular trade, you may still end up wrong about the direction of the market. This is true for everyone, nobody is right every time. You might be wrong this time, but your trading plan (with clearly defined loss thresholds) will save you. So, in the final analysis, it isn’t always being right about the direction of the market that will make you a success. Instead, it is having the discipline to stick to your trading plan that will.