How Do I Commit to a Trade and Actually Stick to It?

What breaking a plan actually costs

Take a plan that risks $200 to make $400 — 1R risk, 2R target — at a 50% win rate. Expectancy is 0.5 x 400 - 0.5 x 200 = $100 per trade.

Now widen the stop to $400 on one trade in five, which is what "giving it room" means in practice. Those trades now risk 2R for the same 2R target. On the widened trades expectancy is 0.5 x 400 - 0.5 x 400 = $0. Across 100 trades: 80 at $100 plus 20 at $0 is $8,000 against $10,000 — a fifth of the year's profit, from a change made on one trade in five, each time for a reason that sounded correct.

The reason it is worth stating in dollars is that the sentence which causes it never sounds like a $2,000 sentence. It sounds like "the level was never the real invalidation point".

Why the revisions are not random

They cluster. Nobody widens a stop on a trade going their way, so the edits land exclusively on positions already moving against them — the population where the rule was about to do its job. This is why "I follow my plan most of the time" is not a meaningful statement: the exceptions are selected, and selected against you.

Decide it where deciding is cheap

Before entry you have no position, no unrealised loss and no story to defend. Ten minutes later you have all three. So the entire content of "commitment" is moving the decision earlier and making the later revision cost something:

• Size from the stop, not from conviction: size = risk / stopDistance. A $200 risk over a $2.00 stop is 100 shares, and no feeling about the setup changes that.
• Both exits before entry — the invalidation price and the target, or the rule that determines it.
• A daily loss limit in units, set before the session, at 2R or 3R, enforced without a conversation.
• A record of all three that you cannot quietly revise afterwards.

Why the record has to be unrevisable

Because you are the one person who cannot audit your own journal. You know what you meant to do, so a note saying you meant to do it reads as confirmation rather than evidence. What an editable file can never establish is whether the version you are reading is the version you wrote before the outcome — and that is the only version with information in it.

Sealing does not stop you widening a stop at the broker; nothing can. What changes is that the widening becomes a recorded fact instead of a private edit, which is the difference between a habit you can see and one you cannot.

The asymmetry has a name and a measurement behind it. Kahneman and Tversky's prospect theory showed that losses and gains are not weighted equally around a reference point, and that people become risk-seeking when facing a loss^[1] — precisely the state in which a plan gets revised. The commitment is worth fixing in advance because the version of you that revises it is predictably not the version that wrote it.

Both directions of the failure are documented. Thaler and Johnson showed that a prior loss makes people accept gambles they would otherwise refuse, when the gamble offers a way back to even.^[2] Shefrin and Statman named the mirror image in 1985: selling winners too early and riding losers too long.^[3] Both effects act on a decision made while the position is live, which is the one decision a commitment made before entry has already taken off the table.

kappi is a trade recorder: you commit a trade before the fact, it is sealed on your device for a time-capsuled delay you choose, then kappi publishes it on a Merkle-anchored log. The record is yours to share, with whoever you choose. $15/month, no free tier.