Oil prices failed to break out on Friday, as traders showed themselves cautious, voicing concerns about global economic growth. (Click to enlarge) (Click to enlarge) (Click to enlarge) (Click to enlarge) (Click to enlarge) (Click to enlarge) (Click to enlarge)Friday, February 8th, 2019 Oil prices have been flat for several days, weighed down by concerns about the health of the global economy, plus the potential return of supply from Libya. “Growing economic concerns, falling stock markets and emerging doubts that the trade conflict between…