if you reverse just because the trade is giving you some heat it could just as easily go back in the original direction again and you end up with 2 losses instead of 1 (or even possibly a winner) that is extremely frustrating and should be avoided
either be patient and set a stop and wait for the stop to be hit or the exit signal to occur.
another approach is that if at some point during the trade its in the red and your conditions for entry no longer exist, you can punch out before it hits your stop
only reverse if the conditions for entry are now replaced by conditions for entry in the other direction. but likely this will not happen very often