The recent low of 2.6735 on 19th July is very close to the 50% retracement level at 2.6675. Another solid close above 2.8670 could argue 2.6735 is the end of wave {c} of 4 and would signal further upside potential. If that's the case, the minimum upside target would be to re-test the blue wave 3 high at 3.322 (on 28th December 2017)