See how price reacts at 1000 pips increments (1, 1.10, 1.20, 1.30) and their quarters (1.25, 1.05, 1.075 and so on). The reaction at those levels is nearly guaranteed. Once price hit 1.10 recently, we saw a pullback of 350 pips to the downside. Those psychological levels will be highly useful to any trader. They work well on majors (USD baed pairs), less so on crosses.