The problem discussed above is quite "popular" among the traders. To my mind, it is caused by something in the sphere of psychology. For example, the reason could be a huge loss incurred recently, or disbelief in trading strategy.
Thus, there could be different approaches to deal with that. First of all, it is necessary to check the strategy to ensure it works the way it should. If the trader knows that his strategy itself is profitable, he would be able to hold positions long enough without doubt, understanding that exit point specified by strategy rules is the best exit point possible.
Depending on particluar strategy traders could use even more extraordinary approaches. For example, mid-term/swing traders could just place alerts and then avoid watching the charts.
Thus, there could be different approaches to deal with that. First of all, it is necessary to check the strategy to ensure it works the way it should. If the trader knows that his strategy itself is profitable, he would be able to hold positions long enough without doubt, understanding that exit point specified by strategy rules is the best exit point possible.
Depending on particluar strategy traders could use even more extraordinary approaches. For example, mid-term/swing traders could just place alerts and then avoid watching the charts.