Trading Psychology
The Mental Game of Trading
Tendler is a mental game coach who came out of poker, and he hands you a procedure instead of a pep talk: write down the pattern, rank it one to ten, find the flawed logic underneath it, then interrupt that logic with a sentence you rehearsed. It only works if you already have an edge.
The one idea
The central claim is that your emotions are not the problem. They are the alarm. Tendler uses a headache: you can swallow painkillers for six months, or you can notice you have been squinting and go get your eyes checked. Anger, fear and greed work the same way. The loss that set you off is only the detonator. The bomb is a piece of faulty logic sitting underneath, something like 'my strategy is profitable, so I should not be taking big losses.' Fight the emotion and you are on a permanent job. Fix the logic and the trigger stops firing at all. He calls that resolution, and he is blunt that emotional control is a lesser goal that caps how good you can get.
That reframe is what makes the rest of the book a procedure rather than advice. If emotion is a signal, then your job is forensic, not moral. And you cannot skip to the answer, because the same mistake has five possible causes. Exiting a trade too early can come from greed, fear, anger, overconfidence, low confidence, or plain boredom. Looking at the error tells you nothing. You have to catalogue what was happening around it: the trigger, the thoughts, the words you said out loud, how your read of the market shifted. Only then do you get to name the cause, and Tendler says experienced traders get this wrong constantly. Presumed greed turns out to be anger. A presumed discipline problem turns out to be overconfidence.
This is where the book sits relative to Mark Douglas. Trading in the Zone diagnoses the same illness and describes the destination beautifully: think in probabilities, accept the risk completely, believe anything can happen. Douglas offers one drill, a twenty-trade exercise on a simple mechanical system, meant to build one belief. It is a good drill and it does not scale. It cannot tell you why you specifically move your stop, or what to say to yourself at 10:15 on a Tuesday when you are about to. Tendler is the operating manual Douglas never wrote. Read Douglas for why the destination is the destination. Read Tendler for the daily work. If you only buy one and you already agree that psychology is your problem, buy this one.
What it actually teaches
The system runs in a fixed order, and skipping ahead is the failure mode Tendler spends the most time warning about.
MAP THE PATTERN
Keep a document open while you trade. Every time you make one of your recurring mistakes, capture eight things: the trigger, your thoughts, your emotions, your behaviors, your actions, how your decision-making changed, how your read of the market changed, and the mistake itself. His sample entry fills all eight lines for a single revenge-trading episode, down to the detail that the trader was watching PnL rather than price and had convinced himself he could predict the next move. Do this every day for one to two weeks. If you trade too fast to take notes, scribble fragments and expand them after the close. Tendler is clear that at the start you will only catch the moment after the blowup, and that is fine, because the minutes right after you lose it are the richest source of clues you will ever get.
RANK IT ONE TO TEN, IN TWO COLUMNS
Sort every detail you collected by severity on a 1 to 10 scale, where 1 is a flicker of irritation and 10 is what happens in a full rage. Then split it into two parallel columns that line up level by level: the mental and emotional side, and the technical side (what your decision-making actually looks like at that intensity). Most traders cannot fill in all ten. Tendler says do a minimum of three and add levels as you learn to see them. Do not revise the map for at least a month, because a shorter sample is not enough evidence that anything really changed. This document is the whole point: it turns 'I tilted' into 'I am at a 3 and a 6 is where I start sizing up.'
DEFINE YOUR RANGE, THEN WORK THE BACK OF IT
Write out your A-game, B-game and C-game, mental and tactical separately. Tendler's picture for this is the Inchworm: your decisions plotted as a bell curve that only moves forward when both ends move. Most traders push only the front, chasing new knowledge and new peaks, which widens the range and produces exactly the wild swings, plateaus and blowups they cannot explain. Your back end does not follow your front end automatically. So the instruction is to fix your three or four worst recurring errors, consistently, before reaching for anything new. He phrases the standard as 'suck less,' and means it literally: 10 percent less bad is a win. His client Brian went from skipping routines entirely when he could not do them perfectly to a documented daily process, with a reported R-factor move from about 1.25 to 2.25. Consider the A-to-C-game draft finished when you go three trading days without spotting anything new.
RUN THE MENTAL HAND HISTORY
Five written steps, and this is the engine of the book. (1) Describe the problem in detail. (2) Explain why it makes sense that you have it. (3) Explain why the logic in step 2 is flawed. (4) Write the correction. (5) Explain why the correction is correct. Step 2 is the one everybody skips and it is the entire trick: Tendler bans the answers 'I am being irrational' and 'the market screwed me' because both end the analysis. His worked example: problem, I cannot accept big losses. Why it makes sense, my strategy is profitable when I follow it. Why that is flawed, saying the strategy is profitable implies I should never take a big loss even when I execute perfectly. Correction, a profitable strategy incurs losses, sometimes big ones, and my edge already accounts for that. He notes most traders jump from step 1 straight to step 4, which is why their fixes sound right and never hold. Expect several sittings across several days per problem.
INJECT LOGIC IN REAL TIME
Four moves, and with practice they take seconds. Recognize the signal from your map. Disrupt the momentum with one of four physical interrupts: a single diaphragmatic breath (into the stomach, not the chest), writing, standing up or walking, or talking to someone. Then inject a bite-sized statement you wrote out and rehearsed before the session. His examples are short and blunt: for FOMO, a reminder that the market keeps producing opportunities and you were never going to catch them all. For mistake tilt, the line that hating mistakes amounts to hating to learn, so the money lost buys a bigger edge. For overconfidence, a flat order to stop fantasizing about the payout and do the job. Fourth, add a Strategic Reminder for the technical side, which can be your list of common mistakes, your full decision process, or just the factors you stop considering when you are hot. Timing is everything: logic is thinking, and once emotion has shut thinking down there is nothing left to inject.
BUILD THE ROUTINE THAT REPEATS IT
None of this resolves anything on one repetition. Warm up for 3 to 5 minutes before the open by rereading your map, your Mental Hand History and your logic statement, and mentally rehearsing the interrupt. Cool down for 5 to 15 minutes, starting within 30 minutes of the close while the emotion is still raw, adding details to the map and venting in writing so the day does not carry into tomorrow. On calm days write down what improved, not just what broke. Tendler's image for the whole thing is chopping down a tree with a blunt axe: you wanted a chainsaw, you got an axe, and the only variable you control is how many swings you take.
What it looks like Monday morning
You open a blank document before the bell and leave it open all session. When you do the thing you always do, moving the stop, chasing the candle, closing the winner three ticks early, you stop for fifteen seconds and write down what came right before it: what triggered it, what you thought, what you said out loud, what changed about how you were reading the chart. That is it for week one. You are not trying to fix anything yet, and Tendler is explicit that you will feel like you are accomplishing nothing while your mistakes keep happening. You are collecting evidence.
The other two changes are small and immediate. You start the day with a three-minute review instead of jumping straight into the open, and you spend ten minutes after the close dumping the day out of your head rather than going to the gym to burn it off. Tendler's point about the gym is worth sitting with: blowing off steam works, but it deletes the clues. The frustration goes away and you learn nothing, which is why you have been having the same bad day for two years.
| Level | Mental and emotional | Decision-making |
|---|---|---|
| 1 | Gripping the mouse tighter. Clicking the chart but not analyzing anything. Wondering why nothing is presenting itself. Tension in my head. | Still following all my indicators, but starting to consider subpar trades to get on the board for the day. |
| 3 | Take a mediocre trade and get stopped out. Tension in my head turns into heat. | Looking to scalp areas I never analyzed pre-market. Take the same trade again, or add to a loser. |
| 6 | Increase position size to make the losses back fast. Fighting myself: you need to stop now, no, I can make this back. Fixated on price, not the chart. | Not paying attention to the bigger picture. Adding contracts and entering blind with a lot of risk. |
| 10 | Do not care, trade all the way to a margin call. Cursing at myself. Smash or throw something. Want to quit. | Gambling and clicking buttons. There is no decision-making process. I do not know what I am doing or why. |
Most traders can only distinguish three or four of the ten levels at first, and Tendler says do at least three rather than waiting until you can fill all of them.
Emotion is never the flaw. Emotion is the signal. Thinking otherwise is like saying a fever is the cause of the flu.Jared Tendler, The Mental Game of Trading
Where it fails
- It cannot help you if you have no edge. Tendler states this on the first page, that a flawless mental game will not make you profitable without an edge, and then never returns to it. He also refuses outright to teach entries, exits, chart reading or fundamentals, saying his successful clients were already skilled enough to know where their real problems lay. The whole diagnostic assumes your losses come from botching a system that works. But the procedure always produces output. A trader with no edge will map patterns, find flaws and write corrections, and none of the five steps can ever return the answer 'your strategy is the problem, go fix that instead.' The book will happily let you spend six months on your psychology when you needed six months on your system.
- The workload is a second job and the book never prices it. Add it up. Notes during every session. One to two weeks of daily mapping. An A-to-C-game analysis rebuilt until you see nothing new for three straight days, then frozen for a month. Mental Hand Histories that take several days and multiple attempts each, one per problem, and he tells you to do a separate set of steps 3 through 5 for every distinct cause you find. A 3 to 5 minute warmup, a 5 to 15 minute cooldown, and hourly logic reviews if you are struggling badly. Nowhere does Tendler say how many weeks or months this takes to reach resolution. The only concrete time gate in 298 pages is chapter 10's advice to abandon an approach if you see no progress in two weeks.
- Every case study is a winner, and every failure is your fault. Four named clients, four turnarounds: Frantz, Brian, Carlos, Will. Brian's R-factor 'increased from around 1.25 to 2.25' with no sample size, no time period, and no note on what the market was doing. Will reports 'about 98% of that initial anger is gone,' self-estimated from memory two years later. There is no failed client in the book, no dropout, no control, no one for whom the system did nothing. Then chapter 10, titled Troubleshooting a Lack of Progress, lists six reasons you are stuck: you did not do the work, you are suppressing, you are overwhelmed, you are burned out, your brain is bloated, your personal life is bleeding in. All six put the failure on the reader. The system is structurally unable to be wrong.
- Injecting Logic fails in exactly the moment you bought the book for. The technique only works before emotion crosses your threshold, because injecting logic is nothing more than thinking, and Tendler's own model says overactive emotion shuts thinking down. He lists this as the first reason it fails and compares trying anyway to running on a broken ankle. But the reason you have a tilt problem is that you do not catch the rise early. His fix is to go back and map earlier signals, which is the step you already could not complete. The mechanism he leans on for the threshold, the Yerkes-Dodson law, is a 1908 mouse experiment that modern psychology treats as a rough metaphor rather than a general law of performance. Scalpers get it worst: he concedes outright that they have no time to use the Strategic Reminder in real time at all.
- You grade your own progress on a scale you invented. The 1 to 10 tilt and fear maps, the A-to-C-game analysis and the listed signals of resolution are all self-reports, produced by the same mind the book says malfunctions under pressure. Tendler acknowledges the ratings will be biased and inaccurate and tells you not to worry about it. He separately warns you not to use the A-to-C-game analysis as an excuse for poor results, which is a warning, not a safeguard. And the goal itself has no finish line: he writes plainly that you will not know when you have crossed it, and offers a list of clues instead. That is an honest admission and it is also a real problem, because it means the system can absorb any amount of your time without ever declaring you done.
- Two thirds of it is a lookup table, not a method. The system lives in chapters 1 through 3 plus chapters 9 and 10, about eighty pages in total. Chapters 4 through 8 are a 200-page catalogue of greed, fear, tilt, confidence and discipline broken into subtypes: FOMO, fear of losing, fear of mistakes, fear of failure, hating to lose, mistake tilt, injustice tilt, revenge trading, entitlement tilt, perfectionism, desperation, impatience, boredom, distractibility, laziness, procrastination. Each gets a description, some quick tips and a sample Mental Hand History. It is genuinely useful once you know which one you are hunting, and it is a grind front to back. Read chapters 1 to 3, then chapter 9, then index the middle.
- Systematic traders get almost nothing. Every error the book is architected around is a discretionary execution error: forcing a mediocre setup, hesitating on an entry, exiting early, chasing price, moving a stop too soon, moving a profit target, talking yourself out of a good trade. That list appears on page one and again in chapter 3, and it is the spine of the diagnostic. If your orders are automated, your mental game shows up as switching the system off in a drawdown, over-fitting after a bad month, or refusing to take a signal you disagree with. Tendler does not cover any of it. The same gap applies to anyone whose problem is actually clinical. He is a licensed therapist and mentions therapy exactly once, in passing, in a case where childhood trauma was surfacing.
Who it is for
Buy it if
You have a system you trust, you can point to the specific execution error that costs you money, and you have already read Douglas and thought 'yes, but how.' This is the how. It is also the right book if you are the kind of person who will actually keep the document, because the value is entirely in the artifacts you produce, not in the reading.
Skip it if
You are still losing because your strategy does not work. You trade a fully automated system. You want a book to read on a flight and feel better afterward, because this one hands you homework in chapter 2 and does not let up. And if you already keep a detailed trading journal with emotional notes and a written pre-market routine, you have built half of this yourself and will find the first three chapters familiar.
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