When you look at high-performers across different domains, one of the core factors in success is consistency - consistency of doing what matters and is needed to be done, day-after-day, week-after-week, month-after-month, year after year.
Consistency is underpinned by commitment.
Commitment can be strengthened by making a specific behaviour, like journaling, a non-negotiable - a must-do behaviour.
Commitment can be strengthened by connecting a specific behaviour, like journaling, to a meaningful goal.
Commitment can be strengthened by connecting a specific behaviour, like journaling, to a value e.g. mastery or discipline.
Commitment can be highly strengthened by connecting a specific behaviour, like journaling, to a value AND a goal, AND by making it a non-negotiable behaviour.
One of my traders uses his journal as a way to demonstrate his commitment to his trading - it acts like an anchor. How well he commits to his journal reflects his commitment to trading at his best.
Keeping a journal is a choice - you choose to do it, or you choose not to do it.
Some choices move you towards being the trader you want to become; and some move you away from the trader you want to become.
Your level of success in trading is a reflection of the choices that you make.
Your choices reflect your level of commitment.