Writing a Trading (or Investing) Plan

beginner7 min read

A written plan decided in calm makes the decisions that panic would otherwise make for you.

A trading (or investing) plan is a written document, decided in advance and in a calm state, that spells out exactly how you’ll make decisions: what you’ll trade, when you’ll enter and exit, how much you’ll risk, and how you’ll behave in various scenarios. It’s the single most important tool for imposing discipline on yourself.

The whole power of a written plan is timing: it lets your calm, rational self make the decisions in advance that your panicked, emotional self would otherwise make in the heat of the moment — badly. In the moment, fear, greed and all the biases from this track hijack you; you’re the worst version of yourself precisely when stakes are highest. A plan written when you’re calm and objective pre-commits you to good behaviour — so when the market crashes and panic screams “sell!”, your plan (which already decided what to do in a crash) overrides the emotion. Writing it down matters enormously: a vague mental “plan” bends to whatever you feel, but a written one is concrete, reviewable, and harder to rationalise away. A good plan covers: your goals and time horizon; your *strategy and edge (what you trade and why); precise entry and exit rules; position sizing and risk limits; what to do in a drawdown or crash (decided before it happens); and how you’ll review yourself. It’s the personal constitution that governs your decisions — and like a constitution, its value is that it was written in calm to constrain you in chaos. The investor without a plan is improvising under emotional pressure; the one with* a plan is executing decisions already made by their clearest mind.

What it is — a written plan, decided in calm, covering what/when/how-much you trade and how you’ll behave in scenarios.
The power — your calm self pre-decides what your panicked self would otherwise botch in the moment.
Write it down — a vague mental plan bends to emotion; a written one is concrete, reviewable, hard to rationalise away.
Covers — goals/horizon, strategy/edge, entry/exit rules, sizing/risk limits, crash-and-drawdown behaviour, review process.

ExampleBefore a crash, Neha’s written plan says: “In a market fall of >20%, I do not sell; I continue SIPs and rebalance into equity.” When the crash comes and panic urges her to sell everything, the plan — written by her calm self — overrides the fear, and she even buys the dip. A friend with no written plan improvises under panic, sells at the bottom, and locks in the loss. The plan made the good decision in advance.

Key takeawayA written trading/investing plan lets your calm, rational self pre-decide what your panicked, emotional self would otherwise botch in the moment. Writing it down (not just thinking it) makes it concrete and hard to rationalise away. Cover goals, strategy, entry/exit, sizing/risk, and crash behaviour — it’s the constitution that governs you in chaos.

FAQs

What should a trading/investing plan include?

At minimum: your goals and time horizon; your strategy and its edge (what you trade and why); precise entry and exit rules; position sizing and risk limits (per-trade and total); pre-decided behaviour for drawdowns and crashes; and how/when you’ll review your decisions. Keep it written and concrete enough that, in any situation, you can consult it rather than improvise under emotional pressure.