There is a number every new trader should know: 90% of retail traders lose money over time. Brokerage firms report this in their own disclosures. The reason usually is not bad analysis. It is bad risk management.

Why Most Traders Lose

Most beginners think about the trade first, then figure out the loss afterwards. That is backwards. A professional decides exactly how much they are willing to lose before they enter. Everything else comes from that number.

The Core Rule: 1-2% Per Trade

Never risk more than 1-2% of your total capital on a single trade.

  • $10,000 account: max loss per trade is $100-$200
  • $5,000 account: max loss per trade is $50-$100
  • $25,000 account: max loss per trade is $250-$500

That ceiling is not a suggestion. It is what keeps you in the game long enough to get good.

How to Size a Position

Follow these steps before every trade:

  • Step 1: decide your entry point
  • Step 2: decide your stop loss level before you enter
  • Step 3: calculate the gap between entry and stop (in dollars per share or units)
  • Step 4: divide your max loss (1-2% of capital) by that gap. That is your position size.

Example: $10,000 account, max loss $100. Stock at $50, stop loss at $48 (gap = $2). Position size = $100 / $2 = 50 shares. If it hits the stop, you lose $100. You move on.

Risk:Reward Ratio

Never enter a trade where the potential gain is not at least 2x the potential loss.

  • Risk $100, target $200 minimum (1:2 ratio)
  • Risk $100, target $300 (1:3 ratio): better

Why it matters even at a 50% win rate: 5 wins at $200 = $1,000. 5 losses at $100 = $500. Net: +$500. You can be wrong half the time and still come out ahead, as long as winners are larger than losers.

Three Mistakes That Blow Accounts

No Stop Loss

"It will recover" has ended more trading accounts than any market crash. Set a stop before you enter, every time.

Moving Your Stop When Losing

When price moves against you and you widen the stop to give it more room, you have just broken your own rules. The stop is decided before entry, not adjusted under pressure.

Averaging Down

Buying more of a losing position hoping to recover the average is how small losses become account-wrecking ones. If the trade is wrong, exit. Do not add.

Risk management is not what limits your profits. It is what keeps you in the game long enough to actually make them. Survive first, then grow.