Argy banks adding volume

NYSE:BMA   Banco Macro S.A.
The 4 ADRs increased volume very noticeably in the last few wheels at the same time as they hit the top of the sideways Bollinger in which they are developing. While the second Bollinger implies a higher range of higher volatility, the previous sentence leaves me with the impression that even this move is coming and that the banks are getting ready to pull back a bit... not too much, I would think, being that the trend of the last few months is sideways.
On a positive note, it is worth noting that they all made higher highs than previous highs, with the exception of SUPV and its usual rebelliousness.