Dear DanPickup,
Yes, my view was w.r.t. one day chart only as these Supp./Res. is given on daily basis.
You are correct in saying if TF = 5 or 10 days then, also we see volatility and Nifty trading within a small range 6000 to 6100. So straddle writers could write straddles at 6000 / 6100...