They don't happen on the same day. Brexit/EU Referendum voting starts on Thursday 23rd and polls close at 22:00 BST. Apparently there are no exit polls(?) so the first results are expected to come in from ~23:30 on the Thursday and will carry on coming until ~07:00 on Friday 24th June, with a half-decent projection of the result probably due around 04:00 on Friday 24th June.
Most broekr giving new notification regarding with brexit and some of broker increasing margin requirement and spread on 20-27 june until 5 times from normal level, because many predicted if market will high volatile on referendum europe
I don't know why today on monday opening market pair gbpusd and also gbpjpy move uptrend with strong movement, might because brexit rumor or something else
So this is reason why gbp currency mve i strong uptrend, but maybe some trader only want to wait and see on referendum europe tomorrow, they still afraid to making decision
Tradestation margin requirement : NOTICE OF UK REFERENDUM (“Brexit”) Dear Customer: In anticipation of possible market disruptions, extreme volatility and/or unusually large moves in market prices related to the June 23 UK “Brexit” referendum, TradeStation will be increasing your margin requirements effective the morning of June 23 through the close of business on June 24. The following futures-related contracts will be impacted: 200% increase to all EUREX products 200% increase to all CME currency products 300% increase to all VIX futures products While no one can anticipate the effects to markets in advance of the eventual outcome of this referendum, we believe that heightened risk awareness is prudent for both our firm and your trading. You should review your account and take whatever measures you believe to be necessary to address the possibility of an extreme or unusual market disruption. Please be aware that TradeStation will exercise its right to liquidate any customer positions at any time should your account fall below existing or revised margin requirements. Regards,