More often than not, when the bull side of GBPUSD meets an unbreakable resistance, the bull side then retreats ( make a retracement, degree varied, from a few points to few ten points). After the retracement, the bull side moves up again. when the bull side meets the resistance again, it usually breaks it with ease. How come it's difficult to break at the first time but easy at the second time ? Is there anyone who has this observation before and who knows what happened behind ?