How to write trading rules you will actually keep

Every trader has rules. Few keep them. Usually that is not a discipline problem — it is the rules: too vague to check, too many to remember, and never compared with what actually happened.

Make every rule checkable

"Do not overtrade" cannot be checked. "No more than five trades a day" can. A good rule is a number or a yes-or-no that a trade either kept or broke, with no room to argue with yourself afterwards.

Start with three

You can add more later. These three cover the days that do the most damage:

Set limits from your own trading

A daily loss limit so wide it never bites does nothing, and one so tight you break it every day gets ignored. Base each limit on your own last month, then tighten it as you keep it.

Write the rule for your worst moment

Rules are easy to keep on a good day. They exist for the bad one: the third loss in a row, the late session, the trade you are sure about. When you write a rule, picture that moment and ask whether the rule would stop you there. If it would not, it is not done yet.

Check every trade, not just the bad days

Memory is kind to us: it remembers the rule we kept and forgets the four times we did not. Counting every chance to break a rule against the times you did tells you which rule is really the problem. For one trader in Tradar, the answer was clear:

That rule — their cooldown after a loss — was the one to work on first. Not all of them. One.

Change a rule without rewriting the past

Rules should change as you learn. But if loosening a limit quietly un-breaks last week’s trades, loosening becomes the fastest way to look disciplined. Tradar judges every trade against the rule you had on the day you took it, so a change only counts from the day you make it.

Look back once a week

• Which rule broke most?
• Which day of the week did it break on?
• What came right before — a loss, a late session, a rough day?

Three questions, ten minutes. That is usually enough to know what to change next week.

What a good rule set looks like

• Few rules — three to five is plenty to start.
• Each one a number or a yes-or-no a trade either kept or broke.
• Limits set from your own last month, not from someone else’s plan.
• Checked on every trade, automatically, not from memory.
• Changed on purpose, and only from the day you change them.

Rules like these are not a cage. They are the plan you made when you were thinking clearly, kept for you on the days you are not.