GbpUsd - trading with pivot points and pivot trend lines

Short term long - price has been oscillating between S1 and R1 of the weekly pivot. Presently price is at S1, which I am hoping will continue to support price allowing price to move up to R1. Price is also below the daily trend and will be below the weekly trend - at this point pound remains a short. Short term pattern appears to be building a bear flag. If price closes below the S1 weekly then I would expect price to challenge S2. I f price closes above the weekly pivot/trend then I would expect a challenge on R1. As usual I will follow this pair on a 15 min to 1 hr timeframe using a 4hr to 8 hr pivot point/trend.