1.For people who are holding their short positions are start taking profit out as the price has reaches Strong trend resistance.
2. It is not ok to long at this time as the Brexit is becoming the "past" and the UK central bank will more likely to take some action to make GBP stop falling .
There are few reasons that I have in mind, but I think with the two points above, the GBP will "definitely" (Very confident to say) go up on next week.
My statement will be invalid when :
1.Price shoots above with a long pin bar , and stands above the trend line with some unexpect news .
1.2 Poor data performance on UK , vice versa on EU