buy above 155 in intraday and swing for swing trade wait for 15 min candle close (only for swing) and for stoploss use it according to your risk.
For stoploss in Intraday use 5 minute chart and see nearest support. for target use 5 min chart and fibonacci pivots as i don't keep predefined target. try to book partially and trail.
Note: this is not a prediction for LONG/SHORT, trade will trigger only on given level as per technical analysis
NOTE: For Gapup or bo before 9:20 If gapup is more than 1% from bo level than avoid completely. if less than 1% or gives bo before 9:20 than wait for first 5 minute candle and entry above 5 minute candle and revised SL below candle Low.