GBP/USD is moving to key place for open Short
If take a look on chart, you could see that price have powerful downtrend. As you know most of the times trend is continue, it is safer to look for deals for Short near key levels. On chart, I see that price bounced several times from 1.3460, that mean, that level is interesting for big players.
For US is the best to Look for Short position near 1.3460
S/L: 1.3510
1T/P: 1.3210
2T/P: 1.3060