(B) Agree 80% - mental can be sufficient once you have adequate experience and cut all the irrelevant stuff from your written plan - but I think you are correct in what you say for those who are starting out.
J_S
The beauty of a written plan is that it is easy to discern whether you followed your plan or didn’t follow your plan. Once you establish that you are following your plan to the letter it is easy to determine whether the system works or doesn’t.
If you have only a mental plan that you modify as you go then you never know if the problem is the plan or the trader.
If you feel that there are certain instances that may cause you to alter your plan you should be able to put them in writing as part of your plan. Then in the heat of battle, so to speak, you will know you planned for such an instance and know exactly what to do.


