The NZDUSD is trading higher by around 0.50% on the day at 0.5919, with buyers maintaining the upper hand after the pair shifted its short-term technical bias to the upside late last week.On Friday, the price moved back above both its 100-hour moving average at 0.5872 and 200-hour moving average at 0.58757. Reclaiming those key moving averages tilted the short-term bias in favor of the buyers and turned attention toward the late-July/early-August swing highs near 0.59066.In trading today, the NZDUSD extended above that 0.59066 level, adding to the bullish momentum. The move higher, however, has run into the next important resistance zone — a swing area dating back to early April between 0.59187 and 0.59280. The high so far has reached 0.5925, putting the pair squarely within that resistance area but still short of a clean breakout.The subsequent pullback during the early North American session took the price back toward the former resistance at 0.59066, but buyers stepped in ahead of that level. That is a positive technical development. Former resistance is so far acting as support, keeping buyers firmly in control.The next challenge is clear. A sustained move above 0.59280 would strengthen the bullish bias and open the door for further upside, with the late-May high near 0.5993 becoming the next major target.For now, the technical picture remains tilted to the upside:Buyers remain in control above 0.59066.Immediate resistance: 0.59187–0.59280.Break above 0.59280: Opens the door toward 0.5993.Move back below 0.59066: Would take some of the steam out of today's bullish move and weaken the short-term technical picture. This article was written by Greg Michalowski at investinglive.com.