What I do is like this:
I use 5-min candles. After the levels are determined, I wait for any of the later candles to close either above the High of first 15 min or below the Low of fist 15 minutes. Then wait for the Buy / Sell levels to be breached and then Enter in appropriate direction. This way I avoid the early hitting of SL.
Today the first 15 min Low was 5180 and High was 5213.25. So far no candle has closed outside this range. Therefore, no entry so far.
-Anant