GBP/USD Technical Analysis: manages to defend ascending trend-channel support

   •  Brexit uncertainties continue to weigh on the British Pound and prompt some aggressive selling during the mid-European session.
   •  The pair extended retracement slide from over 2-week tops and dropped to challenge an ascending trend-channel support on the 4-hourly chart.
   •  A follow-through selling needed to confirm any additional near-term downfall, albeit mixed technical indicators fail to point towards any firm directional bias. 

GBP/USD 4-hourly chart

Spot Rate:  1.3376
Daily Low: 1.3355
Daily High: 1.3439
Trend: 

Resistance
R1:  1.3400 (20-day SMA)
R2:  1.3439 (daily swing high)
R3:  1.3473 (R1 daily pivot-point)

Support
S1:  1.3345 (200-period SMA H1)
S2:  1.3322 (S2 daily pivot-point)
S3:  1.3300 (round figure mark)