Lesson 9: Stops and Position Sizing

📘 Day Trading in 5 Minutes · Lesson 9 of 10

In Lesson 8 you learned where to enter a trade so the chart pays you for being right quickly. Now comes the part that decides whether you are still trading next month: managing what happens when you are wrong.

Here is the uncomfortable truth. Your entries will be wrong a lot. Every trader's are. What separates the people who last from the people who blow up is not how often they are right. It is how much they lose on the bad trades versus how much they keep on the good ones. Risk management is that skill, and it is the only thing standing between you and a zero balance.

The stop loss comes first

A stop loss is the price where you admit the trade is not working and get out. You decide it before you enter, while you are calm and the money is still hypothetical. Once you are in the position, fear and hope take over, and that is exactly when you make bad decisions.

Place your stop at the price that proves your idea wrong. If you bought a breakout above a resistance level, the trade is wrong if price falls back below that level and the support you trusted breaks. So your stop sits just under that level. Not at a round number. Not at "however much I am willing to lose." At the spot where the chart says the setup failed.

Position sizing works backward from risk

Most beginners pick a number of shares first and find out their risk afterward. Professionals do the opposite. You decide how much money you are willing to lose on the trade, then let that decide your share count.

Start with one rule: never risk more than 1 to 2 percent of your account on a single trade. On a 5,000 dollar account, that is 50 to 100 dollars at risk per trade. Not the amount you spend on shares. The amount you lose if your stop gets hit.

The math is simple. Take your dollar risk and divide it by the distance between your entry and your stop.

If the stop hits, you lose 50 dollars, exactly what you planned. A wider stop means fewer shares. A tighter stop means more. Your risk stays fixed no matter what the chart looks like. A position size calculator does this in one tap so you never fumble the math while a setup is live.

Risk-reward is the whole game

Before you take any trade, compare what you stand to lose against what you stand to make. That ratio is your risk-reward. If your stop is 0.50 dollars away and your target is 1.50 dollars away, you are risking one to make three. That is a 1 to 3 setup.

Aim for at least 1 to 2 on the trades you take, and pass on the ones that do not offer it. A clean entry with a nearby stop and a target that sits well above is worth more than a flashy chart with a stop a mile away. Building the habit of sizing the stop and target together is the heart of any stop loss strategy that actually holds up.

Why a low win rate still wins

This is the idea that flips the whole thing on its head. With a 1 to 3 risk-reward, you can be wrong more often than you are right and still grow your account.

Say you take ten trades, each risking 50 dollars to make 150. You lose six of them and win four. The six losers cost you 300 dollars. The four winners bring in 600. You were right less than half the time and you are up 300 dollars. That is the engine. Small controlled losses, larger planned wins, repeated with discipline.

Flip the ratio and watch it collapse. If you let losers run and snatch tiny profits, you can be right seven times out of ten and still end the month in the red. The win rate is not what pays you. The size of your wins against your losses is.

Next up

You now have all nine pieces: the trend, the levels, the volume, the pattern, the entry, the stop, and the size. In Lesson 10 we put them together into one repeatable trade you can run from a blank chart, start to finish, and then I will show you the single most important thing to do before you risk a dollar of real money.