Ask a struggling trader what he needs and he will describe his best day.
He will tell you about the setup he read perfectly, the entry he waited three hours for, the exit he held through the retrace. He wants more of that. He is looking for the thing that will make his good days better: a sharper indicator, a cleaner model, a deeper understanding of liquidity.
He is optimising the wrong end of his own distribution, and the arithmetic is going to be unkind about it.
You are not one trader. You are three.
Your execution is not a constant. It is a range.
There is the trader who shows up rested, waits for the setup, sizes correctly, and takes the loss without flinching. Call that your A-game. There is the trader who mostly follows the plan, takes a slightly early entry, moves a stop once, does nothing catastrophic. Your B-game, and it is most of your trading life.
And then there is the other one. The one who takes a trade he cannot justify twenty minutes after a loss. The one who doubles size because he is behind on the week. The one who watches an unplanned position for forty minutes with his stomach in his throat. Your C-game.
Jared Tendler, who came to trading psychology from poker, built his entire method on the observation that traders obsess over the top of this range and are destroyed by the bottom of it. His image for it is an inchworm: a creature that moves forward by drawing its back end up first. You do not lengthen an inchworm by stretching its head.
The metaphor is memorable. What makes it useful is that it is arithmetically true, and the arithmetic is worse than the metaphor suggests.
The arithmetic of your worst trades
Take a realistic trader. He plays his A-game a quarter of the time and it earns him a healthy +0.35R per trade. He plays his B-game most of the time, which is mildly profitable at +0.12R. And fifteen percent of the time, roughly one session in seven, he plays his C-game, which costs him −0.75R per trade because that is where the oversized trades and the revenge entries and the moved stops live.
This trader is profitable. Barely.
| Execution state | Frequency | Expectancy | Contribution |
|---|---|---|---|
| A-game | 25% | +0.35R | +0.088R |
| B-game | 60% | +0.12R | +0.072R |
| C-game | 15% | −0.75R | −0.113R |
| Net | 100% | +0.047R |
Look at the contribution column, not the expectancy column.
His worst fifteen percent of trades destroy more value than his best twenty-five percent create. The C-game is the largest single term in his equation and it has a minus sign in front of it. Everything he earns at his best, plus a little more, is handed back at his worst.
The uncomfortable line. This trader does not have a strategy problem. He has a strategy that works, run by a trader who is unreliable one session in seven.
Now watch what happens when he tries to fix it
Two interventions. Both plausible. Both the kind of thing traders actually do.
He raises the ceiling. He studies. He refines. He gets 50% better at his best, taking his A-game from +0.35R to +0.525R. That is an enormous, hard-won improvement, the kind that takes a year.
He raises the floor. He does not get better at anything. He simply has half as many C-game sessions, because he stops trading after two losses. Those sessions become ordinary B-game sessions.
| Intervention | New expectancy | Improvement |
|---|---|---|
| Baseline | +0.047R | — |
| A-game 50% better | +0.091R | +93% |
| C-game losses softened to −0.35R | +0.107R | +128% |
| C-game halved in frequency | +0.112R | +139% |
| C-game eliminated | +0.178R | +278% |
Merely halving the frequency of his worst sessions beats a fifty percent improvement in his best trading. Not marginally. By half again.
And here is the figure that should end the argument. For the ceiling strategy to match the floor strategy, his A-game expectancy would have to rise from +0.35R to +0.590R. That is a 69% improvement in his best trading, to achieve what a daily loss limit achieves in a week.
All figures computed from the model above. The specific numbers are illustrative; the ordering is not. Any distribution where your worst state has a large negative expectancy produces the same ranking.
Nobody sells you the daily loss limit. It photographs badly. There is no course in it, no indicator for it, no chart to screenshot. It is just the least glamorous decision available, and it is worth more than a year of study.
Where the account actually breaks
Expectancy per trade is an abstraction. Run the same two traders through 250 trades, fifty thousand times, at 1% risk, and the abstraction becomes a career.
| After 250 trades | Baseline | C-game losses softened |
|---|---|---|
| Median equity | 1.10× | 1.28× |
| Chance of finishing down | 34.6% | 14.1% |
50,000 simulated 250-trade sequences, 1% risk, outcomes sampled around each state’s expectancy.
Same strategy. Same edge. Same market. One trader loses money a third of the time and the other loses money one time in seven, and the only difference between them is what happens after the second loss of the day.
The problem is that you cannot see your C-game
You cannot fix a distribution you have never measured, and almost nobody measures this one. Your journal records what the trade did. It does not record who was trading.
The fix is two columns and takes about eleven seconds a day.
The A/B/C game log
A — I followed the plan. Every entry justified, every stop honoured, size correct. I would take every one of these trades again.
B — Broadly the plan, with a wobble. Entered slightly early. Took a marginal setup. Nothing that would show up on a chart.
C — At least one trade I cannot defend. Unplanned entry, oversized, moved stop, traded to get even.
Grade on execution only. A profitable C-game session is still a C. A losing A-game session is still an A. If you grade on P&L, you have simply built a second, slower P&L column and learned nothing.
That last instruction is the whole discipline, and it is the one people abandon in week two. The market decides the P&L. You decide the grade. Confusing the two is how a trader concludes that his C-game is fine, because the last time he doubled down it worked.
It worked. It was still a C.
After thirty sessions you will have something no strategy backtest can give you: the shape of your own reliability. Most traders are shocked twice. First by how few A sessions there are. Then by how tightly the C sessions cluster around three or four repeating triggers.
Tilt is not one thing, and that is why “stop being emotional” never works
Here is the second half of Tendler’s contribution, and the more useful one.
The generic advice is to be more disciplined. It fails because it treats every C-game session as the same illness. They are not. Carried across from his work in poker, Tendler’s taxonomy separates emotional breakdown into distinct profiles, each with a different underlying belief and therefore a different fix.
Read them and find yourself. You will know within a sentence.
| Profile | The thought underneath | What it needs |
|---|---|---|
| Injustice | “That stop hunt was aimed at me.” | Not calm. A correct model of variance. The market did not know you were there. |
| Hate-losing | “I refuse to close this red.” | A redefinition of losing. A 1R loss taken on plan is a completed job, not a failure. |
| Mistake | “I cannot believe I did that again.” | A process, not more self-criticism. The anger is a signal that the error is correctable, so correct it and move. |
| Entitlement | “I’ve done the work. I’m owed this.” | The market owes you nothing. Effort is an input, not a claim. |
| Revenge | “I’m getting that money back today.” | A hard stop on the session. This one is not reasoned with in the moment. It is prevented. |
| Desperation | “I need this trade to work.” | Usually not a psychology problem. Usually undercapitalisation or a bill due, wearing a psychology costume. |
Notice that the fixes contradict each other.
Injustice tilt needs education about probability. Revenge tilt needs a locked door. Give the revenge trader a lecture on variance and he will nod, agree completely, and place the trade anyway. Give the injustice trader a locked door and he will feel punished for something he does not yet understand, and he will resent the rule until he breaks it.
This is why generic discipline advice has such a poor hit rate. It is not that the advice is wrong. It is that it is a specific treatment being prescribed for an unknown condition.
The diagnostic sequence. Grade the session. Read the C sessions back. Name the profile that keeps appearing. Apply that profile’s fix, and only that one. Everything else is noise you can afford to ignore for now.
What to do on Monday
Three things, in order. Do not skip to the third.
One. Grade every session for thirty days. A, B or C. Execution only. Write the grade before you look at the P&L, which will be difficult and is the point.
Two. Read the C sessions together. Not one at a time, which is how you rationalise them. All of them, side by side. Look for the trigger that precedes the grade. In my experience it is almost never the market. It is a loss taken badly, a missed setup watched running, a poor night’s sleep, or a number you were behind on and wanted to be level with by the close.
Three. Install one rule that makes your worst session less bad. One. Not a system. Not a routine. A single mechanical constraint that fires without requiring your judgement, because your judgement is precisely what is impaired at the moment it fires.
A daily loss limit is the highest-leverage version and it is available to you today. Two losses and the platform closes. No exceptions, no assessment of whether today is different, because the C-game trader is very persuasive on the subject of today being different.
That single rule is the difference between the two columns in the simulation above. It is worth more than a 69% improvement in your best trading, and it costs you nothing but the trades you should not have taken.
The trader you are on your worst day
Every trader knows what he looks like at his best. He can describe that trader in detail, because he has replayed him a hundred times.
Almost none of them can describe the trader they become at loss number three on a Thursday afternoon. That trader is unexamined, unnamed, and in charge of the largest term in the equation.
You do not need to become better than you have ever been. You need to stop being worse than you actually are, one session in seven, for reasons you have never written down.
Raise the floor. The ceiling was never the problem.
Grading a session takes eleven seconds. Remembering to do it is the hard part.
The Edge Companion app logs your daily state and your trades in the same place, then tells you whether one predicts the other. It is free.
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