Light curve of QSO B0218+357 during the flaring state in July/August 2014. Top panel: MAGIC (points) above 100 GeV and a Gaussian fit to the peak position (thick solid line). Second panel from the top: Fermi-LAT above 0.3 GeV with the average flux from the 3rd Fermi Catalog (Acero et al. 2015) marked with a dashed line. Notice that, during the days where the trailing emission was expected Fermi-LAT was in pointing mode allowing the significant detection of lower flux levels. Third panel from the top: Swift-XRT count rate in the 0.3–10 keV range. Bottom panel: KVA in R band (not corrected for the contribution of host/lens galaxies and the Galactic extinction). The two shaded regions are separated by 11.46 days.