On the downside 177.75 is acting as short term support and any break below will drag the pair further down till 177/175.75.
The pair’s short term resistance is around 178.90 and any indicative break above would extend gains till 179.50/180.25.
Indicators (4 Hour chart)
(50) - Sell
(14) - Sell
Recommendation: Sell GBP/JPY around 178.20, SL 179, Targets 177/175.80.