The vertical line marks the date of the BREXIT referendum.
Anticipating a positive result (i.e., STAY), the security will rise from its present bottom.
A positive result in the referendum will bring a peak in the value of both Euro and GBP against the US Dollar, settling back to the current Resistance Line or thereabouts.
A negative result will bring a down-spike, settling back to a lower position in the present range.
(Click on the charge for a larger image).