Understanding Position Sizing Beyond Your Account Balance

A common mistake beginners make is thinking position sizing is just about not blowing up their account. While that's the absolute minimum, effective position sizing is about managing your risk per trade relative to your account size, and critically, your stop-loss placement. You figure out your maximum dollar loss you're willing to accept on a single trade, then divide that by the dollar value of your stop-loss (entry minus stop). This gives you the number of units you can trade. For example, if you risk $100 and your stop is 10 cents away, you can trade 1000 units. Your entry and stop define your risk, not just some arbitrary percentage of your account.