A 61.8 fib retracement of the impulsive move from 35c to 74c would find support at 50c, so rob you may be correct, however this is not my take on the chart currently.
I think there is a case for a shallower retracement than this, and volume here is the key.
Volume has been declining into this pullback, which is bullish in nature
Should price quickly move back to new highs after this pullback it will strengthen the bullish argument, in which case we may see $1 plus in quick time
RES Price at posting:
62.0¢ Sentiment: Buy Disclosure: Held