Yeah that is interesting! I think it is just a misrepresentation of the data, the big vol day in December has thrown it out of whack IMO.
The chart below is my artistic interpretation... The orange line is roughly what the OBV would look like if that spike day was zeroed out, and the red line is if the volume was added rather than subtracted. There must have been a big news event that day? I can only assume it has been positive given the price action in the following months, so I think the red OBV line would be more reflective of the sentiment, if it closed up a couple of pips higher then its a different looking chart.
That all seems to line up better with the weekly MACD and down trend breakout etc.
