USDJPY is getting ready to break free from the 120.ish prison, seems like it took a deep breath and could potentialy move rapidly, taking STOPs above 120.78. Lets see how it goes, will have to loose the position quickly if it doesnt show strength right after the break.
Your trade was very dangerous due to the fact that you were buying a resistance. It is always better to buy retracement on a broken resistance that becomes a support. My 2 cents