The two forces behind every mistake

You spent the whole of Part 2 building a plan: a size for every trade, a stop for every entry, a limit for every day. On paper it is airtight. Then the market opens, real money starts moving, and something strange happens. A green number makes your palms itch to sell and take the profit before it vanishes. A red number makes you look away and wait, certain it will come back. The plan has not changed. You have. Two emotions have walked in and started overruling every rule you set, and they are behind almost every mistake a trader makes.

Two forces, wearing many disguises

The two forces are fear and greed, and they are not villains. They kept your ancestors alive. Fear pulls you away from danger; greed pulls you toward reward. In the market, though, both fire at the wrong times and push you the wrong way, because trading inverts the instincts that serve you everywhere else.

Fear in a trade is the urge to avoid loss and grab safety. It sounds protective, and sometimes it is, but it usually shows up as the wrong action at the wrong moment: selling a winner the instant it shows a profit, because you are afraid of giving it back, and freezing on a loser, unable to take the small loss because closing it makes the loss real. Fear also keeps you out of good trades that match your plan, because the last one hurt.

Greed is the opposite pull, the urge for more. It shows up as buying a bigger position than your plan allows because this one feels certain, chasing a stock that has already run because you cannot bear to miss it, and holding a winner long past your target because a little more seems free. Where fear makes you ration your courage, greed makes you abandon your limits.

The same two forces, all the way down

Almost everything in the rest of this part is one of these two forces taking a specific shape, which is why naming them now matters. When fear makes you grab small profits and nurse big losses, that is the disposition effect, the subject of the next chapter. When greed drags you into a move you never planned because everyone else is in it, that is the fear of missing out, two chapters on. When a loss enrages you into a bigger, hastier trade to win it back, that is tilt, at the end of the part. Even the quiet biases that warp your judgement are often fear and greed dressed as logic, finding reasons for what the emotion already wanted.

So the goal is not to feel no fear and no greed. You will feel both, on every meaningful trade, for as long as you trade. The goal is to notice them, name them in the moment, and refuse to let them touch the rules you set when they were not in the room. That is what the plan from Part 2 is for. It is the voice of the calm you, kept on paper precisely so the frightened or greedy you cannot quietly rewrite it.

What it looks like at your desk

Make it concrete. You buy Reliance at 1,400 with a plan to hold for a move to 1,490 and a stop at 1,370. It ticks up to 1,410, a 660 rupee gain on your 66 shares, and fear arrives: take it, lock it in, what if it falls back. You sell, and watch it climb to 1,490 without you, exactly where your plan said it would go. The next day you buy again, it dips to 1,375, and now the other voice speaks: it is almost at your stop, but it feels wrong to sell here, give it room, it will bounce. You cancel the stop. It falls to 1,300.

In one pair of trades, fear cut your winner short and greed, or its close cousin hope, let your loser run. Both times the plan was right and the emotion was wrong. This is the whole game in miniature.

What to carry forward

Fear and greed are the two forces behind nearly every avoidable loss, and the rest of this part is really a tour of the specific disguises they wear. Fear makes you sell winners and cling to losers; greed makes you over-size, chase, and overstay. You will always feel them, so the skill is to name them and keep them away from the rules you set in the calm.

The next chapter takes the single most expensive shape fear takes, the deeply human habit of grabbing small gains while nursing large losses, and shows why it quietly reverses everything you learned about expectancy.