Avoid gap plays on the following days.
1. Options expiry Fridays. It’s OK to play gap up situation.
2. Rollover Thursday and the day after.
3. First trading day of the new month.
4. Day after Fed day.
5. If after a narrow range day, the next day’s gap is larger than the previous day’s range.
6. Gaps where the opening prices are outside the previous day’s session high or low.