Observation of Past data:

The simplest intra-day trading strategy is to calculate Pivot Point, Mid-Point of yesterday to be compared with Close and if CMP is greater than all 3, i.e. CL, PP, MP, Long for the day with least of 3 as SL and vice versa.

Keep looking MP,PP for today as well and if breaches least of MP and PP of today, book profit.

Check back-data and verify for yourself.