Level 7: FruitLesson 1, 5 min

Why risk comes first

Losses dig a hole that gets deep fast. Lose half and you have to double what's left.

Defense wins the game

Most new traders think about one question: how much can I win? Good traders ask a different question first: how much can I lose?

That sounds backwards. Here's why it isn't.

The math of losses

Say you have $10,000 in a pretend trading .

  • You lose 50%. Now you have $5,000.
  • To get back to $10,000, you need to make $5,000.
  • But $5,000 is 100% of the $5,000 you have left. You have to double your money just to get back to the start.

Losing half can take one bad week. Doubling what's left can take years, or never happen at all.

What you lostWhat you must gain to get back10%11%Lose 10%20%25%Lose 20%30%43%Lose 30%50%100%Lose 50%75%300%Lose 75%
The deeper the hole, the harder the climb. Lose half and you must double what's left.

Look at the bars. A small loss is easy to fix: lose 10%, and you need about 11% to get back. But the bigger the hole, the faster it gets deep:

  • Lose 20%, need 25%.
  • Lose 30%, need about 43%.
  • Lose 50%, need 100%.
  • Lose 75%, need 300%.

That's why traders say: protect the account first, grow it second.

One bad trade can erase ten good ones

Two friends each make 10 trades with $10,000.

  • Mia wins 9 small trades of $100 each. That's $900. On trade 10, price goes against her. She doesn't want to admit she's wrong, so she waits and hopes. It keeps falling. She finally gets out down $2,000. Total: down $1,100.
  • Leo wins only 5 trades, $200 each. He loses the other 5, but he always gets out early, at $100 each. Total: up $500.

Mia was right 9 times out of 10 and still lost money. Leo was right only half the time and made money. The difference wasn't who was smarter. It was who kept losses small.

The three questions

Before every trade, a careful trader answers three questions:

  1. Where will I get out if I'm wrong?
  2. How many dollars will I lose if that happens?
  3. Is that amount small enough that I'm fine losing it?

If you can't answer all three, you're not ready to place the trade. The next lessons show how to answer each one.

Be honest with yourself too: most beginners lose money. The people who last are the ones who keep their small while they learn.

Remember

  • Losses dig a hole that gets deeper faster than you think. Lose 50%, need 100% to get back.
  • One big loss can wipe out many small wins.
  • Before you think about what you can win, decide what you can lose.

Check yourself

1. You have $10,000 and lose 50%. What gain do you need on what's left to get back to $10,000?

2. Which loss is harder to climb back from?

3. Mia won 9 of her 10 trades but still lost money. Why?

4. Which question should a trader answer first?

Next lesson: Position sizing

Money Tree School is education, not financial advice. Examples use made-up or historical numbers to show how things work; they are not recommendations to buy or sell anything. Markets can lose money.