Taking profits, not in relation to time spent in trade, but in relation to how much you did take versus how much you could have taken. MAE and MFE.Fast and slow is relatively to your main TF.
Taking profits in 30 minutes TF after 5 minutes may be fast but under 1 minute, is not.
20 years.. WOW I really admire you.. no sarcasm!
All the best for you.