Applying The Quarters Theory, we can identify the whole number of 190 as well as the half number of 191 as key potential support and resistance. The pair broke decisively above the 190 whole number early in the session, rallying up to test resistance at the 191 half number where it faced selling pressure.
However, by the end of the session the pair managed to close back above 191, which could signal potential for further upside. On the downside, 190 and the quarter-point of 190.25 held as support and will be important levels to monitor.