You square off at 3:10??
Knowing fully well that it takes a minute for spikes to happen... for most brokers the timing is 3:15. Whatever your justification for doing that, I think you would agree that most traders would love to trade as close possible to the closing bell. May not be a deal breaker for me but surely a dampener. Hope you will review this in future.
Ideally, the timing should be 3:25 but even 3:15 or 3:20 will also do given the state of RMS of our brokers.